diff --git a/src/main/java/shop/cazait/domain/user/api/UserApiController.java b/src/main/java/shop/cazait/domain/user/api/UserApiController.java
index 3176e940..68c67455 100644
--- a/src/main/java/shop/cazait/domain/user/api/UserApiController.java
+++ b/src/main/java/shop/cazait/domain/user/api/UserApiController.java
@@ -15,11 +15,11 @@
 import javax.crypto.IllegalBlockSizeException;
 import javax.crypto.NoSuchPaddingException;
 import javax.validation.Valid;
-import javax.validation.constraints.Email;
-import javax.validation.constraints.NotBlank;
+
 import lombok.RequiredArgsConstructor;
 import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
+
 import shop.cazait.domain.user.dto.*;
 import shop.cazait.domain.user.exception.UserException;
 import shop.cazait.domain.user.service.UserService;
@@ -40,25 +40,25 @@ public class UserApiController {
     @NoAuth
     @Operation(summary = "회원 가입", description = "User 정보를 추가하여 회원가입을 진행")
     @PostMapping("/sign-up")
-    public SuccessResponse<PostUserRes> createUser(@RequestBody @Valid PostUserReq postUserReq)
+    public SuccessResponse<UserCreateOutDTO> createUser(@RequestBody @Valid UserCreateInDTO userCreateInDTO)
             throws UserException, InvalidAlgorithmParameterException, NoSuchPaddingException, IllegalBlockSizeException, NoSuchAlgorithmException, BadPaddingException, InvalidKeyException {
-        PostUserRes postUserRes = userService.createUser(postUserReq);
-        return new SuccessResponse<>(CREATE_USER, postUserRes);
+        UserCreateOutDTO userCreateOutDTO = userService.createUser(userCreateInDTO);
+        return new SuccessResponse<>(CREATE_USER, userCreateOutDTO);
     }
 
     @GetMapping("/all")
     @Operation(summary = "모든 회원을 조회", description = "회원가입된 모든 회원 정보를 조회")
-    public SuccessResponse<List<GetUserRes>> getUsers(){
-        List<GetUserRes> allGetUserRes = userService.getAllUsers();
-        return new SuccessResponse<>(SUCCESS, allGetUserRes);
+    public SuccessResponse<List<UserFindOutDTO>> getUsers(){
+        List<UserFindOutDTO> allUserRes = userService.getAllUsers();
+        return new SuccessResponse<>(SUCCESS, allUserRes);
     }
 
     @GetMapping("/{userId}")
     @Operation(summary = "특정 회원 정보를 조회", description ="자신의 계정 정보를 조회")
     @Parameter(name = "userIdx", description = "response로 발급 받은 계정 ID번호",example="1")
-    public SuccessResponse<GetUserRes> getUser(
+    public SuccessResponse<UserFindOutDTO> getUser(
              @PathVariable(name = "userId") Long userIdx) throws UserException {
-        GetUserRes userInfoRes = userService.getUserInfo(userIdx);
+        UserFindOutDTO userInfoRes = userService.getUserInfo(userIdx);
         return new SuccessResponse<>(SUCCESS, userInfoRes);
     }
 
@@ -68,38 +68,38 @@ public SuccessResponse<GetUserRes> getUser(
             @Parameter(name = "userIdx", description = "response로 발급 받은 계정 ID번호",example="1"),
             @Parameter(name = "REFRESH-TOKEN", description = "발급 받은 refreshtoken")}
     )
-    public SuccessResponse<PatchUserRes> modifyUser(
+    public SuccessResponse<UserUpdateOutDTO> modifyUser(
             @PathVariable(name = "userId") Long userIdx,
-            @RequestBody @Valid  PatchUserReq patchUserReq,
+            @RequestBody @Valid UserUpdateInDTO userUpdateInDTO,
             @RequestHeader(value="REFRESH-TOKEN") String refreshToken) throws UserException {
             //jwtService.isValidRefreshToken(refreshToken);
 
-            PatchUserRes patchUserRes = userService.modifyUser(userIdx, patchUserReq, refreshToken);
-            return new SuccessResponse<>(SUCCESS, patchUserRes);
+            UserUpdateOutDTO userUpdateOutDTO = userService.modifyUser(userIdx, userUpdateInDTO, refreshToken);
+            return new SuccessResponse<>(SUCCESS, userUpdateOutDTO);
 
     }
 
     @DeleteMapping("/{userId}")
     @Operation(summary = "특정한 회원 정보를 삭제", description = "자신의 계정 정보를 삭제")
     @Parameter(name = "userId", description = "response로 발급 받은 계정 ID번호",example="1")
-    public SuccessResponse<DeleteUserRes> deleteUser(@PathVariable(name = "userId") Long userIdx) throws UserException {
-        DeleteUserRes deleteUserRes = userService.deleteUser(userIdx);
-        return new SuccessResponse<>(SUCCESS, deleteUserRes);
+    public SuccessResponse<UserDeleteOutDTO> deleteUser(@PathVariable(name = "userId") Long userIdx) throws UserException {
+        UserDeleteOutDTO userDeleteOutDTO = userService.deleteUser(userIdx);
+        return new SuccessResponse<>(SUCCESS, userDeleteOutDTO);
     }
 
     @NoAuth
     @PostMapping ("/email")
     @Operation(summary = "이메일 중복확인", description = "회원가입 전 이미 존재하는 이메일인지 중복확인")
-    public SuccessResponse<String> checkDuplicateEmail(@RequestBody @Valid PostCheckDuplicateEmailReq postCheckDuplicateEmailReq) throws UserException {
-        SuccessResponse<String> emailDuplicateSuccessResponse = userService.checkduplicateEmail(postCheckDuplicateEmailReq);
+    public SuccessResponse<String> checkDuplicateEmail(@RequestBody @Valid UserFindDuplicateEmailInDTO userFindDuplicateEmailInDTO) throws UserException {
+        SuccessResponse<String> emailDuplicateSuccessResponse = userService.checkduplicateEmail(userFindDuplicateEmailInDTO);
         return emailDuplicateSuccessResponse;
     }
 
     @NoAuth
     @PostMapping ("/nickname")
     @Operation(summary = "닉네임 중복확인", description = "회원가입 전 이미 존재하는 닉네임인지 중복확인")
-    public SuccessResponse<String> checkDuplicateNickname(@RequestBody @Valid PostCheckDuplicateNicknameReq postCheckDuplicateNicknameReq) throws UserException {
-        SuccessResponse<String> nicknameDuplicateSuccessResponse = userService.checkduplicateNickname(postCheckDuplicateNicknameReq);
+    public SuccessResponse<String> checkDuplicateNickname(@RequestBody @Valid UserFindDuplicateNicknameInDTO userFindDuplicateNicknameInDTO) throws UserException {
+        SuccessResponse<String> nicknameDuplicateSuccessResponse = userService.checkduplicateNickname(userFindDuplicateNicknameInDTO);
         return nicknameDuplicateSuccessResponse;
     }
 }
diff --git a/src/main/java/shop/cazait/domain/user/dto/PostUserReq.java b/src/main/java/shop/cazait/domain/user/dto/UserCreateInDTO.java
similarity index 92%
rename from src/main/java/shop/cazait/domain/user/dto/PostUserReq.java
rename to src/main/java/shop/cazait/domain/user/dto/UserCreateInDTO.java
index 401d8f71..fa20d726 100644
--- a/src/main/java/shop/cazait/domain/user/dto/PostUserReq.java
+++ b/src/main/java/shop/cazait/domain/user/dto/UserCreateInDTO.java
@@ -11,7 +11,7 @@
 @Schema(description = "유저 정보 Request : 회원 가입에 필요한 유저 정보")
 @Getter
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
-public class PostUserReq {
+public class UserCreateInDTO {
 
     @Email(message = "이메일 형식을 지키세요.")
     @NotBlank
@@ -28,7 +28,7 @@ public class PostUserReq {
     private String nickname;
 
     @Builder
-    public PostUserReq(String email, String password, String nickname){
+    public UserCreateInDTO(String email, String password, String nickname){
         this.email = email;
         this.password = password;
         this.nickname = nickname;
diff --git a/src/main/java/shop/cazait/domain/user/dto/PostUserRes.java b/src/main/java/shop/cazait/domain/user/dto/UserCreateOutDTO.java
similarity index 100%
rename from src/main/java/shop/cazait/domain/user/dto/PostUserRes.java
rename to src/main/java/shop/cazait/domain/user/dto/UserCreateOutDTO.java
diff --git a/src/main/java/shop/cazait/domain/user/dto/DeleteUserRes.java b/src/main/java/shop/cazait/domain/user/dto/UserDeleteOutDTO.java
similarity index 87%
rename from src/main/java/shop/cazait/domain/user/dto/DeleteUserRes.java
rename to src/main/java/shop/cazait/domain/user/dto/UserDeleteOutDTO.java
index edfe26d8..12d32a3c 100644
--- a/src/main/java/shop/cazait/domain/user/dto/DeleteUserRes.java
+++ b/src/main/java/shop/cazait/domain/user/dto/UserDeleteOutDTO.java
@@ -9,7 +9,7 @@
 @Schema(description = "유저 삭제 Response : 삭제 완료된 유저 정보")
 @Getter
 @Builder(access = AccessLevel.PRIVATE)
-public class DeleteUserRes {
+public class UserDeleteOutDTO {
 
     @Schema(name = "회원 id", example = "1")
     private Long id;
@@ -25,8 +25,8 @@ public class DeleteUserRes {
 
 
 
-    public static DeleteUserRes of(User user){
-        return DeleteUserRes.builder()
+    public static UserDeleteOutDTO of(User user){
+        return UserDeleteOutDTO.builder()
                 .id(user.getId())
                 .email(user.getEmail())
                 .password(user.getPassword())
diff --git a/src/main/java/shop/cazait/domain/user/dto/PostCheckDuplicateEmailReq.java b/src/main/java/shop/cazait/domain/user/dto/UserFindDuplicateEmailInDTO.java
similarity index 100%
rename from src/main/java/shop/cazait/domain/user/dto/PostCheckDuplicateEmailReq.java
rename to src/main/java/shop/cazait/domain/user/dto/UserFindDuplicateEmailInDTO.java
diff --git a/src/main/java/shop/cazait/domain/user/dto/PostCheckDuplicateNicknameReq.java b/src/main/java/shop/cazait/domain/user/dto/UserFindDuplicateNicknameInDTO.java
similarity index 100%
rename from src/main/java/shop/cazait/domain/user/dto/PostCheckDuplicateNicknameReq.java
rename to src/main/java/shop/cazait/domain/user/dto/UserFindDuplicateNicknameInDTO.java
diff --git a/src/main/java/shop/cazait/domain/user/dto/GetUserRes.java b/src/main/java/shop/cazait/domain/user/dto/UserFindOutDTO.java
similarity index 100%
rename from src/main/java/shop/cazait/domain/user/dto/GetUserRes.java
rename to src/main/java/shop/cazait/domain/user/dto/UserFindOutDTO.java
diff --git a/src/main/java/shop/cazait/domain/user/dto/PatchUserReq.java b/src/main/java/shop/cazait/domain/user/dto/UserUpdateInDTO.java
similarity index 100%
rename from src/main/java/shop/cazait/domain/user/dto/PatchUserReq.java
rename to src/main/java/shop/cazait/domain/user/dto/UserUpdateInDTO.java
diff --git a/src/main/java/shop/cazait/domain/user/dto/PatchUserRes.java b/src/main/java/shop/cazait/domain/user/dto/UserUpdateOutDTO.java
similarity index 100%
rename from src/main/java/shop/cazait/domain/user/dto/PatchUserRes.java
rename to src/main/java/shop/cazait/domain/user/dto/UserUpdateOutDTO.java
diff --git a/src/main/java/shop/cazait/domain/user/service/UserService.java b/src/main/java/shop/cazait/domain/user/service/UserService.java
index 0bf3d39c..13dcedb7 100644
--- a/src/main/java/shop/cazait/domain/user/service/UserService.java
+++ b/src/main/java/shop/cazait/domain/user/service/UserService.java
@@ -42,25 +42,25 @@ public class UserService {
     private final UserRepository userRepository;
     private final JwtService jwtService;
 
-    public PostUserRes createUser(PostUserReq postUserReq)
+    public UserCreateOutDTO createUser(UserCreateInDTO userCreateInDTO)
             throws UserException, InvalidAlgorithmParameterException, NoSuchPaddingException, IllegalBlockSizeException, NoSuchAlgorithmException, BadPaddingException, InvalidKeyException {
 
-        if (!userRepository.findByEmail(postUserReq.getEmail()).isEmpty()) {
+        if (!userRepository.findByEmail(userCreateInDTO.getEmail()).isEmpty()) {
             throw new UserException(EXIST_EMAIL);
         }
 
-        if (!userRepository.findByNickname(postUserReq.getNickname()).isEmpty()) {
+        if (!userRepository.findByNickname(userCreateInDTO.getNickname()).isEmpty()) {
             throw new UserException(EXIST_NICKNAME);
         }
 
         String pwd;
-        pwd = new AES128(Secret.USER_INFO_PASSWORD_KEY).encrypt(postUserReq.getPassword());
+        pwd = new AES128(Secret.USER_INFO_PASSWORD_KEY).encrypt(userCreateInDTO.getPassword());
 
-        PostUserReq EncryptPostUserReq = new PostUserReq(postUserReq.getEmail(), pwd, postUserReq.getNickname());
-        User user = EncryptPostUserReq.toEntity();
+        UserCreateInDTO encryptUserCreateInDTO = new UserCreateInDTO(userCreateInDTO.getEmail(), pwd, userCreateInDTO.getNickname());
+        User user = encryptUserCreateInDTO.toEntity();
         userRepository.save(user);
 
-        return PostUserRes.of(user);
+        return UserCreateOutDTO.of(user);
     }
 
     public UserAuthenticateOutDTO logIn(UserAuthenticateInDTO userAuthenticateInDTO)
@@ -96,12 +96,12 @@ public UserAuthenticateOutDTO logIn(UserAuthenticateInDTO userAuthenticateInDTO)
     }
 
     @Transactional(readOnly = true)
-    public List<GetUserRes> getAllUsers() {
+    public List<UserFindOutDTO> getAllUsers() {
         List<User> allUsers = userRepository.findAll();
-        List<GetUserRes> userListsRes = new ArrayList<>();
+        List<UserFindOutDTO> userListsRes = new ArrayList<>();
 
         for (User user : allUsers) {
-            GetUserRes of = GetUserRes.of(user);
+            UserFindOutDTO of = UserFindOutDTO.of(user);
             userListsRes.add(of);
         }
 
@@ -109,16 +109,16 @@ public List<GetUserRes> getAllUsers() {
     }
 
     @Transactional(readOnly = true)
-    public GetUserRes getUserInfo(Long userIdx) throws UserException {
+    public UserFindOutDTO getUserInfo(Long userIdx) throws UserException {
         if (userRepository.findById(userIdx).isEmpty()) {
             throw new UserException(NOT_EXIST_USER);
         }
         User findUser = userRepository.findById(userIdx).get();
-        return GetUserRes.of(findUser);
+        return UserFindOutDTO.of(findUser);
     }
 
-    public PatchUserRes modifyUser(Long userIdx, PatchUserReq patchUserReq, String refreshToken) throws UserException {
-        User modifyUser = patchUserReq.toEntity();
+    public UserUpdateOutDTO modifyUser(Long userIdx, UserUpdateInDTO userUpdateInDTO, String refreshToken) throws UserException {
+        User modifyUser = userUpdateInDTO.toEntity();
         if (userRepository.findById(userIdx).isEmpty()) {
             throw new UserException(NOT_EXIST_USER);
         }
@@ -132,29 +132,29 @@ public PatchUserRes modifyUser(Long userIdx, PatchUserReq patchUserReq, String r
                 .refreshToken(refreshToken)
                 .build();
         userRepository.save(existUser);
-        return PatchUserRes.of(existUser);
+        return UserUpdateOutDTO.of(existUser);
     }
 
-    public DeleteUserRes deleteUser(Long userIdx) throws UserException {
+    public UserDeleteOutDTO deleteUser(Long userIdx) throws UserException {
         if (userRepository.findById(userIdx).isEmpty()) {
             throw new UserException(NOT_EXIST_USER);
         }
 
         User deleteUser = userRepository.findById(userIdx).get();
         userRepository.delete(deleteUser);
-        return DeleteUserRes.of(deleteUser);
+        return UserDeleteOutDTO.of(deleteUser);
     }
 
-    public SuccessResponse<String> checkduplicateEmail(PostCheckDuplicateEmailReq postCheckDuplicateEmailReq) throws UserException {
-        String email = postCheckDuplicateEmailReq.getEmail();
+    public SuccessResponse<String> checkduplicateEmail(UserFindDuplicateEmailInDTO userFindDuplicateEmailInDTO) throws UserException {
+        String email = userFindDuplicateEmailInDTO.getEmail();
         if (!userRepository.findByEmail(email).isEmpty()) {
             throw new UserException(EXIST_EMAIL);
         }
         return new SuccessResponse(SIGNUP_AVAILABLE, email);
     }
 
-    public SuccessResponse<String> checkduplicateNickname(PostCheckDuplicateNicknameReq postCheckDuplicateNicknameReq) throws UserException {
-        String nickname = postCheckDuplicateNicknameReq.getNickname();
+    public SuccessResponse<String> checkduplicateNickname(UserFindDuplicateNicknameInDTO userFindDuplicateNicknameInDTO) throws UserException {
+        String nickname = userFindDuplicateNicknameInDTO.getNickname();
         if (!userRepository.findByNickname(nickname.trim()).isEmpty()) {
             throw new UserException(EXIST_NICKNAME);
         }