diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index 8ff53d01..f527e51d 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -1,17 +1,14 @@
-## PR 타입(하나 이상의 PR 타입을 선택해주세요)
+### PR 타입(하나 이상의 PR 타입을 선택해주세요)
 - [ ] 기능 추가
 - [ ] 기능 삭제
 - [ ] 버그 수정
 - [ ] 의존성, 환경 변수, 빌드 관련 코드 업데이트
 
-## 반영 브랜치
+### 반영 브랜치
 ex) feat/login -> develop
 
-## 변경 사항
+### 변경 사항
 ex) 로그인 시, 구글 소셜 로그인 기능을 추가했습니다.
 
-## 이슈
-- 
-
-## 테스트 결과
+### 테스트 결과
 ex) 베이스 브랜치에 포함되기 위한 코드는 모두 정상적으로 동작해야 합니다. 결과물에 대한 스크린샷, GIF, 혹은 라이브 데모가 가능하도록 샘플API를 첨부할 수도 있습니다.
diff --git a/build.gradle b/build.gradle
index f26ab39e..d805d8b0 100644
--- a/build.gradle
+++ b/build.gradle
@@ -34,8 +34,6 @@ dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-web'
 	implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.0.2' //Swagger 의존성 추가
 	implementation 'org.springframework.cloud:spring-cloud-starter-aws:2.2.6.RELEASE' // AWS 서비스 의존성 추가
-	implementation 'org.springframework.boot:spring-boot-starter-validation' // validation
-
 	compileOnly 'org.projectlombok:lombok'
 	runtimeOnly 'com.microsoft.sqlserver:mssql-jdbc'
 	annotationProcessor 'org.projectlombok:lombok'
diff --git a/src/main/java/gaji/service/ServiceApplication.java b/src/main/java/gaji/service/ServiceApplication.java
index d7953bcc..179d0625 100644
--- a/src/main/java/gaji/service/ServiceApplication.java
+++ b/src/main/java/gaji/service/ServiceApplication.java
@@ -9,7 +9,7 @@
 import java.util.TimeZone;
 
 @EnableJpaAuditing
-@SpringBootApplication
+@SpringBootApplication(exclude={DataSourceAutoConfiguration.class})
 public class ServiceApplication {
 
 	public static void main(String[] args) {
diff --git a/src/main/java/gaji/service/config/AmazonConfig.java b/src/main/java/gaji/service/config/AmazonConfig.java
index 5a6d3ba5..52074c1f 100644
--- a/src/main/java/gaji/service/config/AmazonConfig.java
+++ b/src/main/java/gaji/service/config/AmazonConfig.java
@@ -28,19 +28,19 @@ public class AmazonConfig {
     @Value("${cloud.aws.region.static}")
     private String region;
 
-    @Value("${cloud.aws.s3.bucket}")
+    @Value("${cloud.aws.s3.bucket")
     private String bucket;
 
-    @Value("${cloud.aws.s3.path.blog}")
+    @Value("${cloud.aws.s3.path.blog")
     private String blogPath;
 
-    @Value("${cloud.aws.s3.path.project}")
+    @Value("${cloud.aws.s3.path.project")
     private String projectPath;
 
-    @Value("${cloud.aws.s3.path.question}")
+    @Value("${cloud.aws.s3.path.question")
     private String questionPath;
 
-    @Value("${cloud.aws.s3.path.study}")
+    @Value("${cloud.aws.s3.path.study")
     private String studyPath;
 
     @PostConstruct
diff --git a/src/main/java/gaji/service/domain/Report.java b/src/main/java/gaji/service/domain/Report.java
index 0eac33f3..37296af3 100644
--- a/src/main/java/gaji/service/domain/Report.java
+++ b/src/main/java/gaji/service/domain/Report.java
@@ -2,6 +2,7 @@
 
 import gaji.service.domain.enums.ReportPostEnum;
 import gaji.service.domain.enums.ReportPostTypeEnum;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/alram/Alarm.java b/src/main/java/gaji/service/domain/alram/Alarm.java
index 3ab81195..9f863b53 100644
--- a/src/main/java/gaji/service/domain/alram/Alarm.java
+++ b/src/main/java/gaji/service/domain/alram/Alarm.java
@@ -1,6 +1,6 @@
 package gaji.service.domain.alram;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import gaji.service.domain.enums.IsConfirmed;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
diff --git a/src/main/java/gaji/service/domain/alram/UserAlarm.java b/src/main/java/gaji/service/domain/alram/UserAlarm.java
index e62cfdf3..402820bb 100644
--- a/src/main/java/gaji/service/domain/alram/UserAlarm.java
+++ b/src/main/java/gaji/service/domain/alram/UserAlarm.java
@@ -1,6 +1,5 @@
 package gaji.service.domain.alram;
 
-import gaji.service.domain.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/common/entity/BaseEntity.java b/src/main/java/gaji/service/domain/common/BaseEntity.java
similarity index 81%
rename from src/main/java/gaji/service/domain/common/entity/BaseEntity.java
rename to src/main/java/gaji/service/domain/common/BaseEntity.java
index 7ef257e0..5ff7d209 100644
--- a/src/main/java/gaji/service/domain/common/entity/BaseEntity.java
+++ b/src/main/java/gaji/service/domain/common/BaseEntity.java
@@ -1,4 +1,4 @@
-package gaji.service.domain.common.entity;
+package gaji.service.domain.common;
 
 import jakarta.persistence.Column;
 import org.springframework.data.annotation.CreatedDate;
@@ -6,7 +6,7 @@
 
 import java.time.LocalDateTime;
 
-public abstract class BaseEntity {
+public class BaseEntity {
     @CreatedDate
     @Column(updatable = false)
     private LocalDateTime createdAt;
diff --git a/src/main/java/gaji/service/domain/common/converter/HashtagConverter.java b/src/main/java/gaji/service/domain/common/converter/HashtagConverter.java
deleted file mode 100644
index 7267c099..00000000
--- a/src/main/java/gaji/service/domain/common/converter/HashtagConverter.java
+++ /dev/null
@@ -1,41 +0,0 @@
-package gaji.service.domain.common.converter;
-
-import gaji.service.domain.common.entity.Hashtag;
-import gaji.service.domain.common.entity.SelectHashtag;
-import gaji.service.domain.common.service.HashtagQueryService;
-import gaji.service.domain.enums.PostTypeEnum;
-import lombok.RequiredArgsConstructor;
-
-import java.util.List;
-import java.util.stream.Collectors;
-
-
-public class HashtagConverter {
-
-    public static Hashtag toHashtag(String name) {
-        return Hashtag.builder()
-                .name(name)
-                .build();
-
-    }
-
-    public static List<Hashtag> toHashtagList(List<String> hashtagList) {
-        return hashtagList.stream()
-                .map(hashtag ->
-                        Hashtag.builder()
-                                .name(hashtag)
-                                .build()
-                ).collect(Collectors.toList());
-    }
-
-    public static List<SelectHashtag> toSelectHashtagList(List<Hashtag> hashtagList, Long entityId, PostTypeEnum type) {
-        return hashtagList.stream()
-                .map(hashtag ->
-                        SelectHashtag.builder()
-                                .hashtag(hashtag)
-                                .entityId(entityId)
-                                .type(type)
-                                .build()
-                ).collect(Collectors.toList());
-    }
-}
diff --git a/src/main/java/gaji/service/domain/common/repository/HashtagRepository.java b/src/main/java/gaji/service/domain/common/repository/HashtagRepository.java
deleted file mode 100644
index 6ab7ec60..00000000
--- a/src/main/java/gaji/service/domain/common/repository/HashtagRepository.java
+++ /dev/null
@@ -1,9 +0,0 @@
-package gaji.service.domain.common.repository;
-
-import gaji.service.domain.common.entity.Hashtag;
-import org.springframework.data.jpa.repository.JpaRepository;
-
-public interface HashtagRepository extends JpaRepository<Hashtag, Long> {
-    Hashtag findByName(String name);
-    boolean existsByName(String name);
-}
diff --git a/src/main/java/gaji/service/domain/common/repository/SelectHashtagRepository.java b/src/main/java/gaji/service/domain/common/repository/SelectHashtagRepository.java
deleted file mode 100644
index da830a90..00000000
--- a/src/main/java/gaji/service/domain/common/repository/SelectHashtagRepository.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package gaji.service.domain.common.repository;
-
-import gaji.service.domain.common.entity.SelectHashtag;
-import org.springframework.data.jpa.repository.JpaRepository;
-
-public interface SelectHashtagRepository extends JpaRepository<SelectHashtag, Long> {
-}
diff --git a/src/main/java/gaji/service/domain/common/service/HashtagQueryService.java b/src/main/java/gaji/service/domain/common/service/HashtagQueryService.java
deleted file mode 100644
index 42b17233..00000000
--- a/src/main/java/gaji/service/domain/common/service/HashtagQueryService.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package gaji.service.domain.common.service;
-
-
-public interface HashtagQueryService {
-
-    boolean ExistHashtagByName(String name);
-}
diff --git a/src/main/java/gaji/service/domain/common/service/HashtagQueryServiceImpl.java b/src/main/java/gaji/service/domain/common/service/HashtagQueryServiceImpl.java
deleted file mode 100644
index d5434d4f..00000000
--- a/src/main/java/gaji/service/domain/common/service/HashtagQueryServiceImpl.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package gaji.service.domain.common.service;
-
-import gaji.service.domain.common.repository.HashtagRepository;
-import lombok.RequiredArgsConstructor;
-import org.springframework.stereotype.Service;
-
-@Service
-@RequiredArgsConstructor
-public class HashtagQueryServiceImpl implements HashtagQueryService {
-
-    private final HashtagRepository hashtagRepository;
-
-    @Override
-    public boolean ExistHashtagByName(String name) {
-        return hashtagRepository.existsByName(name);
-    }
-}
diff --git a/src/main/java/gaji/service/domain/enums/PostStatusEnum.java b/src/main/java/gaji/service/domain/enums/PostStatusEnum.java
index efa4b512..8168fa0e 100644
--- a/src/main/java/gaji/service/domain/enums/PostStatusEnum.java
+++ b/src/main/java/gaji/service/domain/enums/PostStatusEnum.java
@@ -1,35 +1,5 @@
 package gaji.service.domain.enums;
 
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonValue;
-import lombok.Getter;
-import lombok.extern.slf4j.Slf4j;
-
-@Getter
-@Slf4j
 public enum PostStatusEnum {
-    RECRUITING("모집중"),
-    RECRUITMENT_COMPLETED("모집완료"),
-    NEED_RESOLUTION("해결필요"),
-    RESOLVED("해결완료"),
-    DELETED("삭제됨"),
-    POSTING("게시중");
-
-    @JsonValue
-    private final String value;
-
-    PostStatusEnum(String value) {
-        this.value = value;
-    }
-
-    @JsonCreator // Json -> Object, 역직렬화 수행하는 메서드
-    public static PostStatusEnum from(String param) {
-        for (PostStatusEnum postStatusEnum : PostStatusEnum.values()) {
-            if (postStatusEnum.getValue().equals(param)) {
-                return postStatusEnum;
-            }
-        }
-        log.error("PostStatusEnum.from() exception occur param: {}", param);
-        return null;
-    }
+    RECRUITING, RECRUITMENT_COMPLETED, NEED_RESOLUTION, RESOLVED, DELETED
 }
diff --git a/src/main/java/gaji/service/domain/enums/PostTypeEnum.java b/src/main/java/gaji/service/domain/enums/PostTypeEnum.java
index 2f0887b4..1c03761f 100644
--- a/src/main/java/gaji/service/domain/enums/PostTypeEnum.java
+++ b/src/main/java/gaji/service/domain/enums/PostTypeEnum.java
@@ -1,33 +1,6 @@
 package gaji.service.domain.enums;
 
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonValue;
-import lombok.Getter;
-import lombok.extern.slf4j.Slf4j;
-
-@Getter
-@Slf4j
 public enum PostTypeEnum {
-    BLOG("블로그"),
-    PROJECT_RECRUITMENT("프로젝트 모집"),
-    QUESTION("질문");
-
-    @JsonValue
-    private final String value;
-
-    PostTypeEnum(String value) {
-        this.value = value;
-    }
-
-    @JsonCreator // Json -> Object, 역직렬화 수행하는 메서드
-    public static PostTypeEnum from(String param) {
-        for (PostTypeEnum postTypeEnum : PostTypeEnum.values()) {
-            if (postTypeEnum.getValue().equals(param)) {
-                return postTypeEnum;
-            }
-        }
-        log.error("PostTypeEnum.from() exception occur param: {}", param);
-        return null;
-    }
+    BLOG, PROJECT_RECRUITMENT, RECRUITMENT
 
 }
diff --git a/src/main/java/gaji/service/domain/message/converter/MessageBodyConverter.java b/src/main/java/gaji/service/domain/message/converter/MessageBodyConverter.java
new file mode 100644
index 00000000..b492f781
--- /dev/null
+++ b/src/main/java/gaji/service/domain/message/converter/MessageBodyConverter.java
@@ -0,0 +1,12 @@
+package gaji.service.domain.message.converter;
+
+import gaji.service.domain.message.entity.MessageBody;
+import gaji.service.domain.message.web.dto.MessageRequestDTO;
+
+public class MessageBodyConverter {
+    public static MessageBody toMessageBody(MessageRequestDTO.CreateMessageDTO messageRequestDTO){
+        return MessageBody.builder()
+                .body(messageRequestDTO.getBody())
+                .build();
+    }
+}
diff --git a/src/main/java/gaji/service/domain/message/converter/MessageConverter.java b/src/main/java/gaji/service/domain/message/converter/MessageConverter.java
new file mode 100644
index 00000000..e18d3b60
--- /dev/null
+++ b/src/main/java/gaji/service/domain/message/converter/MessageConverter.java
@@ -0,0 +1,41 @@
+package gaji.service.domain.message.converter;
+
+import gaji.service.domain.message.entity.Message;
+import gaji.service.domain.message.enums.MessageTypeEnum;
+import gaji.service.domain.message.web.dto.MessageRequestDTO;
+import gaji.service.domain.message.web.dto.MessageResponseDTO;
+import gaji.service.domain.user.entity.User;
+
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class MessageConverter {
+    public static MessageResponseDTO.CreateResultDTO toCreateResultDTO(List<Message> messageList){
+        List<Long> messageIds = messageList.stream()
+                .map(Message::getId)
+                .collect(Collectors.toList());
+
+        return MessageResponseDTO.CreateResultDTO.builder()
+                .messageIds(messageIds)
+                .build();
+    }
+
+    public static Message toSendMessage(User mine, User other){
+        return Message.builder()
+                .mine(mine)
+                .other(other)
+                .type(MessageTypeEnum.Send)
+                .sendDate(LocalDateTime.now())
+                .build();
+    }
+
+    public static Message toReceiveMessage(User mine, User other){
+        return Message.builder()
+                .mine(other)
+                .other(mine)
+                .type(MessageTypeEnum.Receive)
+                .sendDate(LocalDateTime.now()).
+                build();
+    }
+}
diff --git a/src/main/java/gaji/service/domain/message/Message.java b/src/main/java/gaji/service/domain/message/entity/Message.java
similarity index 54%
rename from src/main/java/gaji/service/domain/message/Message.java
rename to src/main/java/gaji/service/domain/message/entity/Message.java
index 6d52044b..95e01d59 100644
--- a/src/main/java/gaji/service/domain/message/Message.java
+++ b/src/main/java/gaji/service/domain/message/entity/Message.java
@@ -1,8 +1,10 @@
-package gaji.service.domain.message;
+package gaji.service.domain.message.entity;
 
-import gaji.service.domain.User;
+import gaji.service.domain.message.enums.MessageTypeEnum;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
+import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
@@ -21,20 +23,31 @@ public class Message {
 
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "my_id", referencedColumnName = "user_id")
-    private User sender;
+    private User self;
 
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "other_id", referencedColumnName = "user_id")
-    private User receiver;
+    private User other;
 
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "message_body_id")
     private MessageBody messageBody;
 
-    private Boolean type;
+    private MessageTypeEnum type;
     private LocalDateTime readDate;
     private LocalDateTime sendDate;
 
-
+    @Builder
+    public Message(User mine, User other, MessageTypeEnum type, LocalDateTime sendDate) {
+        this.self = mine;
+        this.other = other;
+        this.type = type;
+        this.sendDate = sendDate;
+    }
+
+    public void setMessageBody(MessageBody messageBody) {
+        this.messageBody = messageBody;
+        messageBody.getMessageList().add(this);
+    }
 
 }
diff --git a/src/main/java/gaji/service/domain/message/MessageBody.java b/src/main/java/gaji/service/domain/message/entity/MessageBody.java
similarity index 72%
rename from src/main/java/gaji/service/domain/message/MessageBody.java
rename to src/main/java/gaji/service/domain/message/entity/MessageBody.java
index dcb49218..867844dd 100644
--- a/src/main/java/gaji/service/domain/message/MessageBody.java
+++ b/src/main/java/gaji/service/domain/message/entity/MessageBody.java
@@ -1,7 +1,9 @@
-package gaji.service.domain.message;
+package gaji.service.domain.message.entity;
 
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
+import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
@@ -21,4 +23,8 @@ public class MessageBody {
 
     private String body;
 
+    @Builder
+    public MessageBody(String body) {
+        this.body = body;
+    }
 }
diff --git a/src/main/java/gaji/service/domain/message/enums/MessageTypeEnum.java b/src/main/java/gaji/service/domain/message/enums/MessageTypeEnum.java
new file mode 100644
index 00000000..5cba7220
--- /dev/null
+++ b/src/main/java/gaji/service/domain/message/enums/MessageTypeEnum.java
@@ -0,0 +1,5 @@
+package gaji.service.domain.message.enums;
+
+public enum MessageTypeEnum {
+    Send, Receive
+}
diff --git a/src/main/java/gaji/service/domain/message/repository/MessageBodyRepository.java b/src/main/java/gaji/service/domain/message/repository/MessageBodyRepository.java
new file mode 100644
index 00000000..dc7f1986
--- /dev/null
+++ b/src/main/java/gaji/service/domain/message/repository/MessageBodyRepository.java
@@ -0,0 +1,7 @@
+package gaji.service.domain.message.repository;
+
+import gaji.service.domain.message.entity.MessageBody;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface MessageBodyRepository extends JpaRepository<MessageBody, Long> {
+}
diff --git a/src/main/java/gaji/service/domain/message/repository/MessageRepository.java b/src/main/java/gaji/service/domain/message/repository/MessageRepository.java
new file mode 100644
index 00000000..c0d8fb18
--- /dev/null
+++ b/src/main/java/gaji/service/domain/message/repository/MessageRepository.java
@@ -0,0 +1,7 @@
+package gaji.service.domain.message.repository;
+
+import gaji.service.domain.message.entity.Message;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface MessageRepository extends JpaRepository<Message, Long> {
+}
diff --git a/src/main/java/gaji/service/domain/message/service/MessageCommandService.java b/src/main/java/gaji/service/domain/message/service/MessageCommandService.java
new file mode 100644
index 00000000..f517066d
--- /dev/null
+++ b/src/main/java/gaji/service/domain/message/service/MessageCommandService.java
@@ -0,0 +1,10 @@
+package gaji.service.domain.message.service;
+
+import gaji.service.domain.message.entity.Message;
+import gaji.service.domain.message.web.dto.MessageRequestDTO;
+
+import java.util.List;
+
+public interface MessageCommandService {
+    public List<Message> createMessage(Long myId, Long otherId, MessageRequestDTO.CreateMessageDTO request);
+}
diff --git a/src/main/java/gaji/service/domain/message/service/MessageCommandServiceImpl.java b/src/main/java/gaji/service/domain/message/service/MessageCommandServiceImpl.java
new file mode 100644
index 00000000..9d331f66
--- /dev/null
+++ b/src/main/java/gaji/service/domain/message/service/MessageCommandServiceImpl.java
@@ -0,0 +1,54 @@
+package gaji.service.domain.message.service;
+
+import gaji.service.domain.message.converter.MessageBodyConverter;
+import gaji.service.domain.message.entity.Message;
+import gaji.service.domain.message.converter.MessageConverter;
+import gaji.service.domain.message.entity.MessageBody;
+import gaji.service.domain.message.repository.MessageBodyRepository;
+import gaji.service.domain.message.repository.MessageRepository;
+import gaji.service.domain.message.web.dto.MessageRequestDTO;
+import gaji.service.domain.user.code.UserErrorStatus;
+import gaji.service.domain.user.entity.User;
+import gaji.service.domain.user.repository.UserRepository;
+import gaji.service.global.exception.RestApiException;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.Arrays;
+import java.util.List;
+
+@Service
+@RequiredArgsConstructor
+public class MessageCommandServiceImpl implements MessageCommandService{
+
+    private final UserRepository userRepository;
+    private final MessageRepository messageRepository;
+    private final MessageBodyRepository messageBodyRepository;
+
+
+    @Override
+    @Transactional
+    public List<Message> createMessage(Long myId, Long otherId, MessageRequestDTO.CreateMessageDTO request) {
+
+        User mine = userRepository.findById(myId)
+                .orElseThrow(()-> new RestApiException(UserErrorStatus._USER_NOT_FOUND));
+        User other = userRepository.findById(otherId)
+                .orElseThrow(()-> new RestApiException(UserErrorStatus._USER_NOT_FOUND));
+
+        Message sendMessage = MessageConverter.toSendMessage(mine,other);
+        Message receiveMessage = MessageConverter.toReceiveMessage(mine, other);
+
+        MessageBody messageBody = MessageBodyConverter.toMessageBody(request);
+
+        //연관관계 매핑을 위해 setter 사용
+        sendMessage.setMessageBody(messageBody);
+        receiveMessage.setMessageBody(messageBody);
+
+        messageRepository.save(sendMessage);
+        messageRepository.save(receiveMessage);
+        messageBodyRepository.save(messageBody);
+
+        return Arrays.asList(sendMessage, receiveMessage);
+    }
+}
diff --git a/src/main/java/gaji/service/domain/message/service/MessageQueryService.java b/src/main/java/gaji/service/domain/message/service/MessageQueryService.java
new file mode 100644
index 00000000..fe109cf1
--- /dev/null
+++ b/src/main/java/gaji/service/domain/message/service/MessageQueryService.java
@@ -0,0 +1,4 @@
+package gaji.service.domain.message.service;
+
+public interface MessageQueryService {
+}
diff --git a/src/main/java/gaji/service/domain/message/service/MessageQueryServiceImpl.java b/src/main/java/gaji/service/domain/message/service/MessageQueryServiceImpl.java
new file mode 100644
index 00000000..a63733ec
--- /dev/null
+++ b/src/main/java/gaji/service/domain/message/service/MessageQueryServiceImpl.java
@@ -0,0 +1,7 @@
+package gaji.service.domain.message.service;
+
+import org.springframework.stereotype.Service;
+
+@Service
+public class MessageQueryServiceImpl implements MessageQueryService{
+}
diff --git a/src/main/java/gaji/service/domain/message/web/controller/MessageRestController.java b/src/main/java/gaji/service/domain/message/web/controller/MessageRestController.java
new file mode 100644
index 00000000..bd49ffea
--- /dev/null
+++ b/src/main/java/gaji/service/domain/message/web/controller/MessageRestController.java
@@ -0,0 +1,32 @@
+package gaji.service.domain.message.web.controller;
+
+import gaji.service.domain.message.entity.Message;
+import gaji.service.domain.message.converter.MessageConverter;
+import gaji.service.domain.message.service.MessageCommandService;
+import gaji.service.domain.message.service.MessageQueryService;
+import gaji.service.domain.message.web.dto.MessageRequestDTO;
+import gaji.service.domain.message.web.dto.MessageResponseDTO;
+import gaji.service.global.base.BaseResponse;
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/messages")
+@RequiredArgsConstructor
+public class MessageRestController {
+    private final MessageCommandService messageCommandService;
+    private final MessageQueryService messageQueryService;
+
+    @PostMapping("/{otherId}")
+    public BaseResponse<MessageResponseDTO.CreateResultDTO> create(Long myId/*하드 코딩용 추후 수정.*/,
+                                                                   //@RequestHeader("Authorization") String token,
+                                                                   @PathVariable Long otherId,
+                                                                   @RequestBody @Valid MessageRequestDTO.CreateMessageDTO request) {
+        //Long myId = getUserIdFromToken(token);
+        List<Message> messageList = messageCommandService.createMessage(myId, otherId, request);
+        return BaseResponse.onSuccess(MessageConverter.toCreateResultDTO(messageList));
+    }
+}
diff --git a/src/main/java/gaji/service/domain/message/web/dto/MessageRequestDTO.java b/src/main/java/gaji/service/domain/message/web/dto/MessageRequestDTO.java
new file mode 100644
index 00000000..506351e4
--- /dev/null
+++ b/src/main/java/gaji/service/domain/message/web/dto/MessageRequestDTO.java
@@ -0,0 +1,15 @@
+package gaji.service.domain.message.web.dto;
+
+import jakarta.validation.constraints.NotBlank;
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+public class MessageRequestDTO {
+
+    @Getter
+    @RequiredArgsConstructor
+    public static class CreateMessageDTO{
+        @NotBlank(message = "쪽지 내용을 입력해주세요.")
+        private String body;
+    }
+}
diff --git a/src/main/java/gaji/service/domain/post/web/dto/PostResponseDTO.java b/src/main/java/gaji/service/domain/message/web/dto/MessageResponseDTO.java
similarity index 52%
rename from src/main/java/gaji/service/domain/post/web/dto/PostResponseDTO.java
rename to src/main/java/gaji/service/domain/message/web/dto/MessageResponseDTO.java
index 127918a8..e723b07a 100644
--- a/src/main/java/gaji/service/domain/post/web/dto/PostResponseDTO.java
+++ b/src/main/java/gaji/service/domain/message/web/dto/MessageResponseDTO.java
@@ -1,18 +1,19 @@
-package gaji.service.domain.post.web.dto;
+package gaji.service.domain.message.web.dto;
 
 import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
+import java.util.List;
 
-public class PostResponseDTO {
+public class MessageResponseDTO {
 
     @Builder
     @Getter
     @NoArgsConstructor
     @AllArgsConstructor
-    public static class CreatePostDTO {
-        Long postId;
+    public static class CreateResultDTO{
+        List<Long> messageIds;
     }
 }
diff --git a/src/main/java/gaji/service/domain/post/annotation/ExistPostType.java b/src/main/java/gaji/service/domain/post/annotation/ExistPostType.java
deleted file mode 100644
index ad053834..00000000
--- a/src/main/java/gaji/service/domain/post/annotation/ExistPostType.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package gaji.service.domain.post.annotation;
-
-import gaji.service.domain.post.validation.PostTypeExistValidator;
-import jakarta.validation.Constraint;
-import jakarta.validation.Payload;
-
-import java.lang.annotation.*;
-
-@Documented
-@Constraint(validatedBy = PostTypeExistValidator.class)
-@Target( { ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER })
-@Retention(RetentionPolicy.RUNTIME)
-public @interface ExistPostType {
-    String message() default "해당하는 게시글 유형이 존재하지 않습니다.";
-    Class<?>[] groups() default {};
-    Class<? extends Payload>[] payload() default {};
-}
diff --git a/src/main/java/gaji/service/domain/post/converter/PostConverter.java b/src/main/java/gaji/service/domain/post/converter/PostConverter.java
index 4c763544..2cc83db3 100644
--- a/src/main/java/gaji/service/domain/post/converter/PostConverter.java
+++ b/src/main/java/gaji/service/domain/post/converter/PostConverter.java
@@ -1,10 +1,10 @@
 package gaji.service.domain.post.converter;
 
-import gaji.service.domain.User;
 import gaji.service.domain.enums.PostStatusEnum;
 import gaji.service.domain.enums.PostTypeEnum;
 import gaji.service.domain.post.entity.Post;
 import gaji.service.domain.post.web.dto.PostRequestDTO;
+import gaji.service.domain.user.entity.User;
 
 public class PostConverter {
 
diff --git a/src/main/java/gaji/service/domain/post/repository/PostRepository.java b/src/main/java/gaji/service/domain/post/repository/PostRepository.java
deleted file mode 100644
index 424ffe4c..00000000
--- a/src/main/java/gaji/service/domain/post/repository/PostRepository.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package gaji.service.domain.post.repository;
-
-import gaji.service.domain.post.entity.Post;
-import org.springframework.data.jpa.repository.JpaRepository;
-
-public interface PostRepository extends JpaRepository<Post, Long> {
-}
diff --git a/src/main/java/gaji/service/domain/post/service/PostCommandService.java b/src/main/java/gaji/service/domain/post/service/PostCommandService.java
deleted file mode 100644
index d3166853..00000000
--- a/src/main/java/gaji/service/domain/post/service/PostCommandService.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package gaji.service.domain.post.service;
-
-import gaji.service.domain.post.entity.Post;
-import gaji.service.domain.post.web.dto.PostRequestDTO;
-
-public interface PostCommandService {
-
-    Post uploadPost(Long userId, PostRequestDTO.UploadPostDTO request);
-
-}
diff --git a/src/main/java/gaji/service/domain/post/service/PostCommandServiceImpl.java b/src/main/java/gaji/service/domain/post/service/PostCommandServiceImpl.java
index 44305126..458ff5c4 100644
--- a/src/main/java/gaji/service/domain/post/service/PostCommandServiceImpl.java
+++ b/src/main/java/gaji/service/domain/post/service/PostCommandServiceImpl.java
@@ -1,6 +1,5 @@
 package gaji.service.domain.post.service;
 
-import gaji.service.domain.User;
 import gaji.service.domain.common.converter.HashtagConverter;
 import gaji.service.domain.common.entity.Hashtag;
 import gaji.service.domain.common.entity.SelectHashtag;
@@ -11,6 +10,7 @@
 import gaji.service.domain.post.entity.Post;
 import gaji.service.domain.post.repository.PostRepository;
 import gaji.service.domain.post.web.dto.PostRequestDTO;
+import gaji.service.domain.user.entity.User;
 import gaji.service.domain.user.repository.UserRepository;
 import gaji.service.global.exception.RestApiException;
 import lombok.RequiredArgsConstructor;
diff --git a/src/main/java/gaji/service/domain/post/validation/PostTypeExistValidator.java b/src/main/java/gaji/service/domain/post/validation/PostTypeExistValidator.java
deleted file mode 100644
index 38e0bef4..00000000
--- a/src/main/java/gaji/service/domain/post/validation/PostTypeExistValidator.java
+++ /dev/null
@@ -1,29 +0,0 @@
-package gaji.service.domain.post.validation;
-
-import gaji.service.domain.enums.PostTypeEnum;
-import gaji.service.domain.post.annotation.ExistPostType;
-import gaji.service.domain.post.code.PostErrorStatus;
-import jakarta.validation.ConstraintValidator;
-import jakarta.validation.ConstraintValidatorContext;
-import org.springframework.stereotype.Component;
-
-@Component
-public class PostTypeExistValidator implements ConstraintValidator<ExistPostType, PostTypeEnum> {
-
-    @Override
-    public void initialize(ExistPostType constraintAnnotation) {
-        ConstraintValidator.super.initialize(constraintAnnotation);
-    }
-
-    @Override
-    public boolean isValid(PostTypeEnum value, ConstraintValidatorContext context) {
-        boolean isValid = value == PostTypeEnum.BLOG || value == PostTypeEnum.PROJECT_RECRUITMENT || value == PostTypeEnum.QUESTION;
-
-        if (!isValid) {
-            context.disableDefaultConstraintViolation();
-            context.buildConstraintViolationWithTemplate(PostErrorStatus._POST_TYPE_NOT_FOUND.getMessage()).addConstraintViolation();
-        }
-
-        return isValid;
-    }
-}
diff --git a/src/main/java/gaji/service/domain/post/web/controller/PostRestController.java b/src/main/java/gaji/service/domain/post/web/controller/PostRestController.java
deleted file mode 100644
index 948599d4..00000000
--- a/src/main/java/gaji/service/domain/post/web/controller/PostRestController.java
+++ /dev/null
@@ -1,31 +0,0 @@
-package gaji.service.domain.post.web.controller;
-
-import gaji.service.domain.post.entity.Post;
-import gaji.service.domain.post.service.PostCommandService;
-import gaji.service.domain.post.web.dto.PostRequestDTO;
-import gaji.service.global.base.BaseResponse;
-import io.swagger.v3.oas.annotations.Operation;
-import jakarta.validation.Valid;
-import lombok.RequiredArgsConstructor;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestBody;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-
-@RestController
-@RequiredArgsConstructor
-@RequestMapping("/api/community-posts")
-public class PostRestController {
-
-    private final PostCommandService postCommandService;
-
-    @PostMapping
-    @Operation(summary = "커뮤니티 게시글 업로드 API",description = "커뮤니티의 게시글을 업로드하는 API입니다. 게시글 유형과 제목, 본문 내용을 검증합니다.")
-    public BaseResponse<Long> uploadPost(Long userId, @RequestBody @Valid PostRequestDTO.UploadPostDTO request) {
-        Post newPost = postCommandService.uploadPost(userId, request);
-        return BaseResponse.onSuccess(newPost.getId());
-    }
-
-
-}
diff --git a/src/main/java/gaji/service/domain/post/web/dto/PostRequestDTO.java b/src/main/java/gaji/service/domain/post/web/dto/PostRequestDTO.java
deleted file mode 100644
index f9006951..00000000
--- a/src/main/java/gaji/service/domain/post/web/dto/PostRequestDTO.java
+++ /dev/null
@@ -1,34 +0,0 @@
-package gaji.service.domain.post.web.dto;
-
-import gaji.service.domain.enums.PostTypeEnum;
-import gaji.service.domain.post.annotation.ExistPostType;
-import io.swagger.v3.oas.annotations.media.Schema;
-import jakarta.validation.constraints.NotBlank;
-import lombok.Getter;
-import lombok.RequiredArgsConstructor;
-
-import java.util.ArrayList;
-import java.util.List;
-
-public class PostRequestDTO {
-
-    @Schema(description = "커뮤니티 게시글 저장 DTO")
-    @Getter
-    @RequiredArgsConstructor
-    public static class UploadPostDTO {
-        @Schema(description = "게시글 제목")
-        @NotBlank(message = "게시글 제목을 입력해주세요.")
-        private final String title;
-
-        @Schema(description = "게시글 본문")
-        @NotBlank(message = "게시글 본문을 입력해주세요.")
-        private final String body;
-
-        @Schema(description = "게시글 유형(프로젝트 모집, 질문, 블로그)")
-        @ExistPostType
-        private final PostTypeEnum type;
-
-        @Schema(description = "해시태그 리스트")
-        private final List<String> hashtagList = new ArrayList<>();
-    }
-}
diff --git a/src/main/java/gaji/service/domain/post/entity/Comment.java b/src/main/java/gaji/service/domain/psot/Comment.java
similarity index 92%
rename from src/main/java/gaji/service/domain/post/entity/Comment.java
rename to src/main/java/gaji/service/domain/psot/Comment.java
index 2d933365..a375f0c3 100644
--- a/src/main/java/gaji/service/domain/post/entity/Comment.java
+++ b/src/main/java/gaji/service/domain/psot/Comment.java
@@ -1,6 +1,6 @@
-package gaji.service.domain.post.entity;
+package gaji.service.domain.psot;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import gaji.service.domain.enums.CommentStatus;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
diff --git a/src/main/java/gaji/service/domain/post/entity/Post.java b/src/main/java/gaji/service/domain/psot/Post.java
similarity index 69%
rename from src/main/java/gaji/service/domain/post/entity/Post.java
rename to src/main/java/gaji/service/domain/psot/Post.java
index 85ea0e12..8b4893e8 100644
--- a/src/main/java/gaji/service/domain/post/entity/Post.java
+++ b/src/main/java/gaji/service/domain/psot/Post.java
@@ -1,11 +1,10 @@
-package gaji.service.domain.post.entity;
+package gaji.service.domain.psot;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import gaji.service.domain.enums.PostStatusEnum;
 import gaji.service.domain.enums.PostTypeEnum;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
-import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
@@ -44,21 +43,4 @@ public class Post {
 
     @Enumerated(EnumType.STRING)
     private PostStatusEnum status;
-
-    @Builder
-    public Post(User user, String title, String body, PostTypeEnum type, PostStatusEnum status) {
-        this.user = user;
-        this.title = title;
-        this.body = body;
-        this.type = type;
-        this.status = status;
-    }
-
-    // 엔티티 생성 시 초기값 설정
-    @PrePersist
-    public void prePersist() {
-        this.views = 0;
-        this.likes = 0;
-        this.bookmarks = 0;
-    }
 }
diff --git a/src/main/java/gaji/service/domain/post/entity/PostBookmark.java b/src/main/java/gaji/service/domain/psot/PostBookmark.java
similarity index 86%
rename from src/main/java/gaji/service/domain/post/entity/PostBookmark.java
rename to src/main/java/gaji/service/domain/psot/PostBookmark.java
index 5180c3a4..3e233e50 100644
--- a/src/main/java/gaji/service/domain/post/entity/PostBookmark.java
+++ b/src/main/java/gaji/service/domain/psot/PostBookmark.java
@@ -1,6 +1,6 @@
-package gaji.service.domain.post.entity;
+package gaji.service.domain.psot;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/post/entity/PostFile.java b/src/main/java/gaji/service/domain/psot/PostFile.java
similarity index 86%
rename from src/main/java/gaji/service/domain/post/entity/PostFile.java
rename to src/main/java/gaji/service/domain/psot/PostFile.java
index 6f4ba260..a56ed4a2 100644
--- a/src/main/java/gaji/service/domain/post/entity/PostFile.java
+++ b/src/main/java/gaji/service/domain/psot/PostFile.java
@@ -1,6 +1,6 @@
-package gaji.service.domain.post.entity;
+package gaji.service.domain.psot;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/post/entity/PostLikes.java b/src/main/java/gaji/service/domain/psot/PostLikes.java
similarity index 86%
rename from src/main/java/gaji/service/domain/post/entity/PostLikes.java
rename to src/main/java/gaji/service/domain/psot/PostLikes.java
index 667b3aa3..fced5139 100644
--- a/src/main/java/gaji/service/domain/post/entity/PostLikes.java
+++ b/src/main/java/gaji/service/domain/psot/PostLikes.java
@@ -1,6 +1,6 @@
-package gaji.service.domain.post.entity;
+package gaji.service.domain.psot;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/recruite/Category.java b/src/main/java/gaji/service/domain/recruite/Category.java
index 1abe3841..2d6eb55c 100644
--- a/src/main/java/gaji/service/domain/recruite/Category.java
+++ b/src/main/java/gaji/service/domain/recruite/Category.java
@@ -21,4 +21,4 @@ public class Category {
 
     @Column(length = 30)
     private String name;
-}
\ No newline at end of file
+}
diff --git a/src/main/java/gaji/service/domain/common/entity/Hashtag.java b/src/main/java/gaji/service/domain/recruite/Hashtag.java
similarity index 53%
rename from src/main/java/gaji/service/domain/common/entity/Hashtag.java
rename to src/main/java/gaji/service/domain/recruite/Hashtag.java
index 398e1d3b..fd615456 100644
--- a/src/main/java/gaji/service/domain/common/entity/Hashtag.java
+++ b/src/main/java/gaji/service/domain/recruite/Hashtag.java
@@ -1,16 +1,10 @@
-package gaji.service.domain.common.entity;
+package gaji.service.domain.recruite;
 
-import gaji.service.domain.enums.PostTypeEnum;
-import gaji.service.domain.recruite.SelectCategory;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
-import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
-import java.util.ArrayList;
-import java.util.List;
-
 @Entity
 @Getter
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
@@ -22,8 +16,4 @@ public class Hashtag {
     @Column(length = 30)
     private String name;
 
-    @Builder
-    public Hashtag(String name) {
-        this.name = name;
-    }
 }
diff --git a/src/main/java/gaji/service/domain/recruite/RecruitPost.java b/src/main/java/gaji/service/domain/recruite/RecruitPost.java
index 8f5a68f7..c6b01bfa 100644
--- a/src/main/java/gaji/service/domain/recruite/RecruitPost.java
+++ b/src/main/java/gaji/service/domain/recruite/RecruitPost.java
@@ -1,10 +1,10 @@
 package gaji.service.domain.recruite;
 
-import gaji.service.domain.User;
 import gaji.service.domain.common.entity.BaseEntity;
 import gaji.service.domain.common.entity.SelectHashtag;
 import gaji.service.domain.enums.RecruitePostTypeEnum;
 import gaji.service.domain.room.Room;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/recruite/RecruitPostBookmark.java b/src/main/java/gaji/service/domain/recruite/RecruitPostBookmark.java
index d128f452..0485ef78 100644
--- a/src/main/java/gaji/service/domain/recruite/RecruitPostBookmark.java
+++ b/src/main/java/gaji/service/domain/recruite/RecruitPostBookmark.java
@@ -1,6 +1,6 @@
 package gaji.service.domain.recruite;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/recruite/RecruitPostLikes.java b/src/main/java/gaji/service/domain/recruite/RecruitPostLikes.java
index 16f91cfa..8e27dbab 100644
--- a/src/main/java/gaji/service/domain/recruite/RecruitPostLikes.java
+++ b/src/main/java/gaji/service/domain/recruite/RecruitPostLikes.java
@@ -1,6 +1,6 @@
 package gaji.service.domain.recruite;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/recruite/SearchKeyword.java b/src/main/java/gaji/service/domain/recruite/SearchKeyword.java
index 913a02f5..3b637efa 100644
--- a/src/main/java/gaji/service/domain/recruite/SearchKeyword.java
+++ b/src/main/java/gaji/service/domain/recruite/SearchKeyword.java
@@ -1,6 +1,6 @@
 package gaji.service.domain.recruite;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/common/entity/SelectHashtag.java b/src/main/java/gaji/service/domain/recruite/SelectHashtag.java
similarity index 50%
rename from src/main/java/gaji/service/domain/common/entity/SelectHashtag.java
rename to src/main/java/gaji/service/domain/recruite/SelectHashtag.java
index 4299b07b..e9a2e693 100644
--- a/src/main/java/gaji/service/domain/common/entity/SelectHashtag.java
+++ b/src/main/java/gaji/service/domain/recruite/SelectHashtag.java
@@ -1,9 +1,7 @@
-package gaji.service.domain.common.entity;
+package gaji.service.domain.recruite;
 
-import gaji.service.domain.enums.PostTypeEnum;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
-import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
@@ -15,19 +13,12 @@ public class SelectHashtag {
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
 
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "post_id")
+    private RecruitPost recruitPost;
+
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "hashtag_id")
     private Hashtag hashtag;
 
-    private Long entityId;
-
-    @Enumerated(EnumType.STRING)
-    private PostTypeEnum type;
-
-    @Builder
-    public SelectHashtag(Hashtag hashtag, Long entityId, PostTypeEnum type) {
-        this.hashtag = hashtag;
-        this.entityId = entityId;
-        this.type = type;
-    }
 }
diff --git a/src/main/java/gaji/service/domain/room/Event.java b/src/main/java/gaji/service/domain/room/Event.java
index c6f383dd..625c1ffb 100644
--- a/src/main/java/gaji/service/domain/room/Event.java
+++ b/src/main/java/gaji/service/domain/room/Event.java
@@ -1,6 +1,6 @@
 package gaji.service.domain.room;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import gaji.service.domain.myRepeat.MyRepeat;
 import gaji.service.domain.myRepeat.RepeatException;
 import jakarta.persistence.*;
diff --git a/src/main/java/gaji/service/domain/room/VoiceChatUser.java b/src/main/java/gaji/service/domain/room/VoiceChatUser.java
index cad8ddce..c5b44470 100644
--- a/src/main/java/gaji/service/domain/room/VoiceChatUser.java
+++ b/src/main/java/gaji/service/domain/room/VoiceChatUser.java
@@ -1,6 +1,6 @@
 package gaji.service.domain.room;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/roomPost/RoomComment.java b/src/main/java/gaji/service/domain/roomPost/RoomComment.java
index fdf20c12..38273c64 100644
--- a/src/main/java/gaji/service/domain/roomPost/RoomComment.java
+++ b/src/main/java/gaji/service/domain/roomPost/RoomComment.java
@@ -1,9 +1,7 @@
 package gaji.service.domain.roomPost;
 
-import gaji.service.domain.User;
-import gaji.service.domain.enums.RoomAlarmTypeEnum;
+import gaji.service.domain.user.entity.User;
 import gaji.service.domain.enums.UserAlarmTypeEnum;
-import gaji.service.domain.studyMate.StudyMate;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/roomPost/RoomCommentLikes.java b/src/main/java/gaji/service/domain/roomPost/RoomCommentLikes.java
index 8cef1a00..9a1b892c 100644
--- a/src/main/java/gaji/service/domain/roomPost/RoomCommentLikes.java
+++ b/src/main/java/gaji/service/domain/roomPost/RoomCommentLikes.java
@@ -1,7 +1,6 @@
 package gaji.service.domain.roomPost;
 
-import gaji.service.domain.User;
-import gaji.service.domain.studyMate.StudyMate;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/roomPost/RoomPost.java b/src/main/java/gaji/service/domain/roomPost/RoomPost.java
index 8af0dc00..cae40819 100644
--- a/src/main/java/gaji/service/domain/roomPost/RoomPost.java
+++ b/src/main/java/gaji/service/domain/roomPost/RoomPost.java
@@ -1,6 +1,6 @@
 package gaji.service.domain.roomPost;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import gaji.service.domain.enums.PostStatusEnum;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
diff --git a/src/main/java/gaji/service/domain/roomPost/RoomPostBookmark.java b/src/main/java/gaji/service/domain/roomPost/RoomPostBookmark.java
index a8662b02..28f860d9 100644
--- a/src/main/java/gaji/service/domain/roomPost/RoomPostBookmark.java
+++ b/src/main/java/gaji/service/domain/roomPost/RoomPostBookmark.java
@@ -1,6 +1,6 @@
 package gaji.service.domain.roomPost;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/roomPost/RoomPostFile.java b/src/main/java/gaji/service/domain/roomPost/RoomPostFile.java
index 766e80f2..aa1328cb 100644
--- a/src/main/java/gaji/service/domain/roomPost/RoomPostFile.java
+++ b/src/main/java/gaji/service/domain/roomPost/RoomPostFile.java
@@ -1,6 +1,6 @@
 package gaji.service.domain.roomPost;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/roomPost/RoomPostLikes.java b/src/main/java/gaji/service/domain/roomPost/RoomPostLikes.java
index 656bebe3..58fc86c3 100644
--- a/src/main/java/gaji/service/domain/roomPost/RoomPostLikes.java
+++ b/src/main/java/gaji/service/domain/roomPost/RoomPostLikes.java
@@ -1,6 +1,6 @@
 package gaji.service.domain.roomPost;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/roomPost/RoomPostReport.java b/src/main/java/gaji/service/domain/roomPost/RoomPostReport.java
index 2e9ae6b3..5fcf5640 100644
--- a/src/main/java/gaji/service/domain/roomPost/RoomPostReport.java
+++ b/src/main/java/gaji/service/domain/roomPost/RoomPostReport.java
@@ -1,6 +1,6 @@
 package gaji.service.domain.roomPost;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import gaji.service.domain.enums.ReportPostTypeEnum;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
diff --git a/src/main/java/gaji/service/domain/studyMate/ChatMessage.java b/src/main/java/gaji/service/domain/studyMate/ChatMessage.java
index b7cbfe93..913602d4 100644
--- a/src/main/java/gaji/service/domain/studyMate/ChatMessage.java
+++ b/src/main/java/gaji/service/domain/studyMate/ChatMessage.java
@@ -1,6 +1,6 @@
 package gaji.service.domain.studyMate;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/studyMate/ChatUser.java b/src/main/java/gaji/service/domain/studyMate/ChatUser.java
index 5f679949..08590887 100644
--- a/src/main/java/gaji/service/domain/studyMate/ChatUser.java
+++ b/src/main/java/gaji/service/domain/studyMate/ChatUser.java
@@ -1,6 +1,6 @@
 package gaji.service.domain.studyMate;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/studyMate/StudyApplicant.java b/src/main/java/gaji/service/domain/studyMate/StudyApplicant.java
index 3791c1cb..7c2dd50d 100644
--- a/src/main/java/gaji/service/domain/studyMate/StudyApplicant.java
+++ b/src/main/java/gaji/service/domain/studyMate/StudyApplicant.java
@@ -1,6 +1,6 @@
 package gaji.service.domain.studyMate;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import gaji.service.domain.enums.ApplicantStatus;
 import gaji.service.domain.room.Room;
 import jakarta.persistence.*;
diff --git a/src/main/java/gaji/service/domain/studyMate/StudyMate.java b/src/main/java/gaji/service/domain/studyMate/StudyMate.java
index 799f61c8..4b06d1c3 100644
--- a/src/main/java/gaji/service/domain/studyMate/StudyMate.java
+++ b/src/main/java/gaji/service/domain/studyMate/StudyMate.java
@@ -1,8 +1,7 @@
 package gaji.service.domain.studyMate;
 
 
-import gaji.service.domain.User;
-import gaji.service.domain.roomPost.RoomComment;
+import gaji.service.domain.user.entity.User;
 import gaji.service.domain.enums.Role;
 import gaji.service.domain.room.Room;
 import jakarta.persistence.*;
@@ -10,9 +9,6 @@
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
-import java.util.ArrayList;
-import java.util.List;
-
 @Entity
 @Getter
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
diff --git a/src/main/java/gaji/service/domain/studyMate/UserAssignment.java b/src/main/java/gaji/service/domain/studyMate/UserAssignment.java
index eb15cfae..c69bd41d 100644
--- a/src/main/java/gaji/service/domain/studyMate/UserAssignment.java
+++ b/src/main/java/gaji/service/domain/studyMate/UserAssignment.java
@@ -1,6 +1,6 @@
 package gaji.service.domain.studyMate;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/term/TermAgree.java b/src/main/java/gaji/service/domain/term/TermAgree.java
index 8759fce1..68b1c7cf 100644
--- a/src/main/java/gaji/service/domain/term/TermAgree.java
+++ b/src/main/java/gaji/service/domain/term/TermAgree.java
@@ -1,6 +1,6 @@
 package gaji.service.domain.term;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
diff --git a/src/main/java/gaji/service/domain/token.java b/src/main/java/gaji/service/domain/token.java
index d231cc1a..86594e4c 100644
--- a/src/main/java/gaji/service/domain/token.java
+++ b/src/main/java/gaji/service/domain/token.java
@@ -1,12 +1,12 @@
 package gaji.service.domain;
 
 import gaji.service.domain.enums.IsRevoked;
+import gaji.service.domain.user.entity.User;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
-import java.time.LocalDate;
 import java.time.LocalDateTime;
 
 @Entity
diff --git a/src/main/java/gaji/service/domain/post/code/PostErrorStatus.java b/src/main/java/gaji/service/domain/user/code/UserErrorStatus.java
similarity index 70%
rename from src/main/java/gaji/service/domain/post/code/PostErrorStatus.java
rename to src/main/java/gaji/service/domain/user/code/UserErrorStatus.java
index 7b4b06dd..638d835b 100644
--- a/src/main/java/gaji/service/domain/post/code/PostErrorStatus.java
+++ b/src/main/java/gaji/service/domain/user/code/UserErrorStatus.java
@@ -1,4 +1,4 @@
-package gaji.service.domain.post.code;
+package gaji.service.domain.user.code;
 
 import gaji.service.global.exception.code.BaseCodeDto;
 import gaji.service.global.exception.code.BaseErrorCodeInterface;
@@ -6,13 +6,11 @@
 import lombok.Getter;
 import org.springframework.http.HttpStatus;
 
-
 @Getter
 @AllArgsConstructor
-public enum PostErrorStatus implements BaseErrorCodeInterface {
+public enum UserErrorStatus implements BaseErrorCodeInterface {
 
-    _POST_TYPE_NOT_FOUND(HttpStatus.BAD_REQUEST, "POST_4001", "존재하지 않는 게시글 유형입니다."),
-    _USER_NOT_FOUND(HttpStatus.BAD_REQUEST, "USER_4001", "존재하지 않는 회원입니다."), // user 도메인을 건드리지 않기 위해 생성한 임시 에러코드
+    _USER_NOT_FOUND(HttpStatus.BAD_REQUEST, "USER_4001", "존재하지 않는 회원입니다."),
     ;
 
     private final HttpStatus httpStatus;
diff --git a/src/main/java/gaji/service/domain/user/converter/UserConverter.java b/src/main/java/gaji/service/domain/user/converter/UserConverter.java
new file mode 100644
index 00000000..393d8582
--- /dev/null
+++ b/src/main/java/gaji/service/domain/user/converter/UserConverter.java
@@ -0,0 +1,4 @@
+package gaji.service.domain.user.converter;
+
+public class UserConverter {
+}
diff --git a/src/main/java/gaji/service/domain/User.java b/src/main/java/gaji/service/domain/user/entity/User.java
similarity index 95%
rename from src/main/java/gaji/service/domain/User.java
rename to src/main/java/gaji/service/domain/user/entity/User.java
index f23ad847..08cf0f58 100644
--- a/src/main/java/gaji/service/domain/User.java
+++ b/src/main/java/gaji/service/domain/user/entity/User.java
@@ -1,12 +1,13 @@
-package gaji.service.domain;
+package gaji.service.domain.user.entity;
 
+import gaji.service.domain.Report;
 import gaji.service.domain.alram.Alarm;
 import gaji.service.domain.common.entity.BaseEntity;
 import gaji.service.domain.enums.Gender;
 import gaji.service.domain.enums.Role;
 import gaji.service.domain.enums.SocialType;
 import gaji.service.domain.enums.UserActive;
-import gaji.service.domain.message.Message;
+import gaji.service.domain.message.entity.Message;
 import gaji.service.domain.post.entity.*;
 import gaji.service.domain.recruite.*;
 import gaji.service.domain.room.Event;
@@ -66,10 +67,10 @@ public class User extends BaseEntity {
     @OneToMany(mappedBy = "user",cascade = CascadeType.ALL )
     private List<RecruitPostBookmark> recruitPostBookmarkList = new ArrayList<>();
 
-    @OneToMany(mappedBy = "sender")
+    @OneToMany(mappedBy = "self")
     private List<Message> sentMessages = new ArrayList<>();
 
-    @OneToMany(mappedBy = "receiver")
+    @OneToMany(mappedBy = "other")
     private List<Message> receivedMessages = new ArrayList<>();
 
     @OneToMany(mappedBy = "user")
diff --git a/src/main/java/gaji/service/domain/user/repository/UserRepository.java b/src/main/java/gaji/service/domain/user/repository/UserRepository.java
index a13426fb..7d1d3be0 100644
--- a/src/main/java/gaji/service/domain/user/repository/UserRepository.java
+++ b/src/main/java/gaji/service/domain/user/repository/UserRepository.java
@@ -1,7 +1,10 @@
 package gaji.service.domain.user.repository;
 
-import gaji.service.domain.User;
+import gaji.service.domain.user.entity.User;
 import org.springframework.data.jpa.repository.JpaRepository;
 
+import java.util.Optional;
+
 public interface UserRepository extends JpaRepository<User, Long> {
+    Optional<User> findById(Long id);
 }
diff --git a/src/main/java/gaji/service/domain/user/service/UserCommandService.java b/src/main/java/gaji/service/domain/user/service/UserCommandService.java
new file mode 100644
index 00000000..fb379dc3
--- /dev/null
+++ b/src/main/java/gaji/service/domain/user/service/UserCommandService.java
@@ -0,0 +1,4 @@
+package gaji.service.domain.user.service;
+
+public interface UserCommandService {
+}
diff --git a/src/main/java/gaji/service/domain/user/service/UserCommandServiceImpl.java b/src/main/java/gaji/service/domain/user/service/UserCommandServiceImpl.java
new file mode 100644
index 00000000..32fc08a4
--- /dev/null
+++ b/src/main/java/gaji/service/domain/user/service/UserCommandServiceImpl.java
@@ -0,0 +1,8 @@
+package gaji.service.domain.user.service;
+
+import org.springframework.stereotype.Service;
+
+@Service
+public class UserCommandServiceImpl implements UserCommandService{
+
+}
diff --git a/src/main/java/gaji/service/domain/user/service/UserQueryService.java b/src/main/java/gaji/service/domain/user/service/UserQueryService.java
new file mode 100644
index 00000000..6e503a92
--- /dev/null
+++ b/src/main/java/gaji/service/domain/user/service/UserQueryService.java
@@ -0,0 +1,4 @@
+package gaji.service.domain.user.service;
+
+public interface UserQueryService {
+}
diff --git a/src/main/java/gaji/service/domain/user/service/UserQueryServiceImpl.java b/src/main/java/gaji/service/domain/user/service/UserQueryServiceImpl.java
new file mode 100644
index 00000000..1dc40949
--- /dev/null
+++ b/src/main/java/gaji/service/domain/user/service/UserQueryServiceImpl.java
@@ -0,0 +1,7 @@
+package gaji.service.domain.user.service;
+
+import org.springframework.stereotype.Service;
+
+@Service
+public class UserQueryServiceImpl implements UserQueryService {
+}
diff --git a/src/main/java/gaji/service/domain/user/web/controller/UserRestController.java b/src/main/java/gaji/service/domain/user/web/controller/UserRestController.java
new file mode 100644
index 00000000..c866a100
--- /dev/null
+++ b/src/main/java/gaji/service/domain/user/web/controller/UserRestController.java
@@ -0,0 +1,22 @@
+package gaji.service.domain.user.web.controller;
+
+import gaji.service.domain.user.converter.UserConverter;
+import gaji.service.domain.user.entity.User;
+import gaji.service.domain.user.service.UserCommandService;
+import gaji.service.domain.user.service.UserQueryService;
+import gaji.service.domain.user.web.dto.UserResponseDTO;
+import gaji.service.global.base.BaseResponse;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/users")
+@RequiredArgsConstructor
+public class UserRestController {
+    private final UserCommandService userCommandService;
+    private final UserQueryService userQueryService;
+}
+
diff --git a/src/main/java/gaji/service/domain/user/web/dto/UserResponseDTO.java b/src/main/java/gaji/service/domain/user/web/dto/UserResponseDTO.java
new file mode 100644
index 00000000..a31a197e
--- /dev/null
+++ b/src/main/java/gaji/service/domain/user/web/dto/UserResponseDTO.java
@@ -0,0 +1,14 @@
+package gaji.service.domain.user.web.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.time.LocalDateTime;
+
+public class UserResponseDTO {
+}
+
+
+