diff --git a/README.md b/README.md
index 1425d3bf..b7b1a869 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,9 @@
 # BangFer-Back_End
 방구석 퍼거슨 벡엔드 리포지토리
 
+![image](https://github.com/user-attachments/assets/809dbaeb-b0b6-4eaf-ab32-6caaa95e48a0)
+
+
 ## 👥 Server 팀원
 |고민영|김종우|김근식|
 |:-:|:-:|:-:|
@@ -18,3 +21,6 @@
 |:rocket: | `:rocket:` |  `chore`   | 패키지 매니저 수정 (Dockerfile, gradle, sh, yml) |
 |:fire: | `:fire:` |  `delete`   | 코드/파일 삭제 |
 |:ambulance: | `:ambulance:` |    `!hotfix`     | 급하게 치명적인 버그를 고쳐야 하는 경우 |
+
+## ERD
+![image](https://github.com/user-attachments/assets/8966793b-2bdb-4cc0-b363-231ff155c102)
diff --git a/src/main/java/com/capstone/BnagFer/domain/accounts/controller/AccountsController.java b/src/main/java/com/capstone/BnagFer/domain/accounts/controller/AccountsController.java
index 168d081b..712be348 100644
--- a/src/main/java/com/capstone/BnagFer/domain/accounts/controller/AccountsController.java
+++ b/src/main/java/com/capstone/BnagFer/domain/accounts/controller/AccountsController.java
@@ -9,6 +9,7 @@
 import com.capstone.BnagFer.domain.accounts.jwt.dto.JwtDto;
 import com.capstone.BnagFer.domain.accounts.jwt.exception.SecurityCustomException;
 import com.capstone.BnagFer.domain.accounts.jwt.exception.TokenErrorCode;
+import com.capstone.BnagFer.domain.accounts.service.account.AccountsCommonService;
 import com.capstone.BnagFer.domain.accounts.service.account.AccountsQueryService;
 import com.capstone.BnagFer.domain.accounts.service.account.AccountsService;
 import com.capstone.BnagFer.domain.accounts.service.account.KakaoService;
@@ -37,6 +38,7 @@ public class AccountsController {
     private final JwtProvider jwtProvider;
     private final KakaoService kakaoService;
     private final EmailService emailService;
+    private final AccountsCommonService accountsCommonService;
 
     @Operation(summary = "일반 로그인", description = "이메일, 비밀번호를 입력받아 로그인을 진행합니다. 이때, FCM토큰을 같이 넘겨줘야 함." +
             "반환 값으로 JWT accessToken과 refreshToken이 발급됨. accessToken 값을 Authorize에 인증")
@@ -152,9 +154,16 @@ public ApiResponse<String> verifyCode(@Valid @RequestBody EmailVerifyDto request
         boolean check = emailService.verifyCode(requestDto);
         if (check) {
             return ApiResponse.onSuccess("인증 완료!");
-        }
-        else {
+        } else {
             return ApiResponse.onFailure(HttpStatus.BAD_REQUEST.name(), "인증 실패");
         }
     }
+
+    @Operation(summary = "이메일 사용 가능 여부 확인", description = "이메일을 입력받아 사용 가능한지 여부를 확인합니다.")
+    @GetMapping("/checkEmail")
+    public ApiResponse<String> checkEmailAvailability(@RequestParam String email) {
+        accountsCommonService.checkUserEmail(email);
+        return ApiResponse.onSuccess("사용 가능한 이메일입니다.");
+    }
+
 }
diff --git a/src/main/java/com/capstone/BnagFer/domain/accounts/service/account/AccountsCommonService.java b/src/main/java/com/capstone/BnagFer/domain/accounts/service/account/AccountsCommonService.java
index 87f7599c..cc0999de 100644
--- a/src/main/java/com/capstone/BnagFer/domain/accounts/service/account/AccountsCommonService.java
+++ b/src/main/java/com/capstone/BnagFer/domain/accounts/service/account/AccountsCommonService.java
@@ -2,6 +2,7 @@
 
 import com.capstone.BnagFer.domain.accounts.entity.User;
 import com.capstone.BnagFer.domain.accounts.exception.AccountsExceptionHandler;
+import com.capstone.BnagFer.domain.accounts.repository.UserJpaRepository;
 import com.capstone.BnagFer.domain.report.entity.UserActivity;
 import com.capstone.BnagFer.global.common.ErrorCode;
 import lombok.RequiredArgsConstructor;
@@ -13,6 +14,8 @@
 @Service
 public class AccountsCommonService {
 
+    private final UserJpaRepository userJpaRepository;
+
     public void checkUserProfile(User user) {
         if (user.getProfile() == null)
             throw new AccountsExceptionHandler(ErrorCode.PROFILE_NOT_EXIST);
@@ -23,9 +26,9 @@ public void checkUserActivity(User user) {
             throw new AccountsExceptionHandler(ErrorCode.USER_IS_BANNED);
     }
 
-    public void validateStaffAccess(User user) {
-        if (!user.getIsStaff()) {
-            throw new AccountsExceptionHandler(ErrorCode.USER_IS_NOT_STAFF);
+    public void checkUserEmail(String email) {
+        if (userJpaRepository.existsByEmail(email)) {
+            throw new AccountsExceptionHandler(ErrorCode.EMAIL_ALREADY_EXIST);
         }
     }
 }
\ No newline at end of file
diff --git a/src/main/java/com/capstone/BnagFer/domain/accounts/service/account/AccountsService.java b/src/main/java/com/capstone/BnagFer/domain/accounts/service/account/AccountsService.java
index 8344ab0f..32e44e86 100644
--- a/src/main/java/com/capstone/BnagFer/domain/accounts/service/account/AccountsService.java
+++ b/src/main/java/com/capstone/BnagFer/domain/accounts/service/account/AccountsService.java
@@ -31,6 +31,7 @@ public class AccountsService {
     private final PasswordEncoder passwordEncoder;
     private final JwtProvider jwtProvider;
     private final RedisUtil redisUtil;
+    private final AccountsCommonService accountsCommonService;
 
     public UserLoginResponseDto login(UserLoginRequestDto requestDto) {
 
@@ -67,9 +68,7 @@ public UserSignupResponseDto signup(UserSignupRequestDto requestDto) {
             throw new AccountsExceptionHandler(ErrorCode.PASSWORD_NOT_EQUAL);
 
         // 이메일 중복 확인
-        if (userJpaRepository.existsByEmail(requestDto.email())) {
-            throw new AccountsExceptionHandler(ErrorCode.USER_ALREADY_EXIST);
-        }
+        accountsCommonService.checkUserEmail(requestDto.email());
 
         String encodedPw = passwordEncoder.encode(requestDto.password());
         User user = requestDto.toEntity(encodedPw);
@@ -144,9 +143,7 @@ public void updateEmail(HttpServletRequest request, User user, ChangeEmailReques
         }
 
         // 새 이메일이 이미 사용 중인지 확인
-        if (userJpaRepository.existsByEmail(requestDto.newEmail())) {
-            throw new AccountsExceptionHandler(ErrorCode.EMAIL_ALREADY_EXIST);
-        }
+        accountsCommonService.checkUserEmail(requestDto.newEmail());
 
         // 이메일 변경
         user.updateEmail(requestDto);
diff --git a/src/main/java/com/capstone/BnagFer/domain/tactic/controller/TacticController.java b/src/main/java/com/capstone/BnagFer/domain/tactic/controller/TacticController.java
index 90b09641..c9ea09fb 100644
--- a/src/main/java/com/capstone/BnagFer/domain/tactic/controller/TacticController.java
+++ b/src/main/java/com/capstone/BnagFer/domain/tactic/controller/TacticController.java
@@ -92,8 +92,8 @@ public ApiResponse<TacticResponse> updateTactic(@PathVariable(name = "tacticId")
 
     @Operation(summary = "전술 복사후 가져오기", description = "다른 사람의 전술을 복사해서 작성자를 자신으로 하여 저장.")
     @PostMapping("/{tacticId}")
-    public ApiResponse<TacticResponse> copyTactic(@PathVariable(name = "tacticId") Long tacticId, @LoginUser User user) {
-        TacticResponse tacticDetail = tacticService.copyTactic(tacticId, user);
+    public ApiResponse<CopyTacticResponse> copyTactic(@PathVariable(name = "tacticId") Long tacticId, @LoginUser User user) {
+        CopyTacticResponse tacticDetail = tacticService.copyTactic(tacticId, user);
         return ApiResponse.onSuccess(tacticDetail);
     }
 
diff --git a/src/main/java/com/capstone/BnagFer/domain/tactic/dto/CopyTacticResponse.java b/src/main/java/com/capstone/BnagFer/domain/tactic/dto/CopyTacticResponse.java
new file mode 100644
index 00000000..76d8a26a
--- /dev/null
+++ b/src/main/java/com/capstone/BnagFer/domain/tactic/dto/CopyTacticResponse.java
@@ -0,0 +1,59 @@
+package com.capstone.BnagFer.domain.tactic.dto;
+
+import com.capstone.BnagFer.domain.tactic.entity.Position;
+import com.capstone.BnagFer.domain.tactic.entity.Tactic;
+import com.capstone.BnagFer.domain.tactic.entity.TacticPositionDetail;
+import lombok.Builder;
+
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.stream.Collectors;
+
+@Builder
+public record CopyTacticResponse(
+        Long tacticId,
+        Long userId,
+        String nickname,
+        String tacticName,
+        Boolean anonymous,
+        String mainFormation,
+        List<TacticDetailResponse.DetailList> positionDetail,
+        String tacticDetails,
+        String subTactic,
+        LocalDateTime createdAt,
+        LocalDateTime updatedAt) {
+    public static CopyTacticResponse from(Tactic tactic) {
+
+        return CopyTacticResponse.builder()
+                .tacticId(tactic.getTacticId())
+                .userId(tactic.getUser().getId())
+                .nickname(tactic.getUser().getProfile().getNickname())
+                .tacticName(tactic.getTacticName())
+                .anonymous(tactic.isAnonymous())
+                .mainFormation(tactic.getMainFormation())
+                .positionDetail(CopyTacticResponse.DetailList.from(tactic.getTacticPositionDetails()))
+                .tacticDetails(tactic.getTacticDetails())
+                .subTactic(tactic.getSubTactic())
+                .createdAt(tactic.getCreatedAt())
+                .updatedAt(tactic.getUpdatedAt())
+                .build();
+    }
+
+    @Builder
+    public record DetailList(
+            Long detailId,
+            Position position,
+            String positionDescription
+    ){
+        public static TacticDetailResponse.DetailList from(TacticPositionDetail tacticPositionDetail){
+            return TacticDetailResponse.DetailList.builder()
+                    .detailId(tacticPositionDetail.getDetailId())
+                    .position(tacticPositionDetail.getPosition())
+                    .positionDescription(tacticPositionDetail.getPositionDescription())
+                    .build();
+        }
+        public static List<TacticDetailResponse.DetailList> from(List<TacticPositionDetail> positions){
+            return positions.stream().map(TacticDetailResponse.DetailList::from).toList();
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/capstone/BnagFer/domain/tactic/entity/Tactic.java b/src/main/java/com/capstone/BnagFer/domain/tactic/entity/Tactic.java
index acdd514e..6bb2fe6d 100644
--- a/src/main/java/com/capstone/BnagFer/domain/tactic/entity/Tactic.java
+++ b/src/main/java/com/capstone/BnagFer/domain/tactic/entity/Tactic.java
@@ -85,4 +85,8 @@ public void updateTactic(TacticUpdateRequest request){
     public static Tactic createTactic() {
         return new Tactic();
     }
+
+    public void setTacticPositionDetails(List<TacticPositionDetail> tacticPositionDetails) {
+        this.tacticPositionDetails = tacticPositionDetails;
+    }
 }
diff --git a/src/main/java/com/capstone/BnagFer/domain/tactic/entity/TacticPositionDetail.java b/src/main/java/com/capstone/BnagFer/domain/tactic/entity/TacticPositionDetail.java
index a40a9d3a..d00a7197 100644
--- a/src/main/java/com/capstone/BnagFer/domain/tactic/entity/TacticPositionDetail.java
+++ b/src/main/java/com/capstone/BnagFer/domain/tactic/entity/TacticPositionDetail.java
@@ -32,4 +32,10 @@ public void updateDetail(DetailUpdateRequest request){
         position = request.position();
         positionDescription = request.positionDescription();
     }
+
+    public void setDetail(Tactic tactic, TacticPositionDetail request){
+        this.tactic = tactic;
+        position = request.getPosition();
+        positionDescription = request.getPositionDescription();
+    }
 }
diff --git a/src/main/java/com/capstone/BnagFer/domain/tactic/service/TacticService.java b/src/main/java/com/capstone/BnagFer/domain/tactic/service/TacticService.java
index 20e173c8..48138422 100644
--- a/src/main/java/com/capstone/BnagFer/domain/tactic/service/TacticService.java
+++ b/src/main/java/com/capstone/BnagFer/domain/tactic/service/TacticService.java
@@ -20,6 +20,7 @@
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
 
@@ -90,7 +91,8 @@ private void createPositionDetails(List<DetailCreateRequest> positionDetails, Ta
         }
     }
 
-    public TacticResponse copyTactic(Long tacticId, User user) {
+    @Transactional
+    public CopyTacticResponse copyTactic(Long tacticId, User user) {
 
         Tactic tactic = tacticRepository.findById(tacticId).orElseThrow(() -> new TacticExceptionHandler(ErrorCode.TACTIC_NOT_FOUND));
 
@@ -100,11 +102,20 @@ public TacticResponse copyTactic(Long tacticId, User user) {
         Tactic copyTactic = Tactic.createTactic();
         copyTactic.setCopyDetail(user, tactic);
 
+        // 깊은 복사 수행
+        copyTactic.setTacticPositionDetails(new ArrayList<>());
+        for (TacticPositionDetail detail : tactic.getTacticPositionDetails()) {
+            TacticPositionDetail copyDetail = new TacticPositionDetail();
+            // TacticPositionDetail의 모든 필드를 복사
+            copyDetail.setDetail(copyTactic, detail);
+            copyTactic.getTacticPositionDetails().add(copyDetail);
+        }
+
         // 프로필 존재 확인
         accountsCommonService.checkUserProfile(user);
         tacticRepository.save(copyTactic);
 
-        return TacticResponse.from(copyTactic);
+        return CopyTacticResponse.from(copyTactic);
     }
 
     public CommentResponse createComment(Long tacticId, CommentCreateRequest request, User user, Long parentCommentId){
@@ -198,4 +209,4 @@ private void sendNotification(User user, Tactic tactic, Long parentCommentId, Ta
         }
     }
 
-}
+}
\ No newline at end of file
diff --git a/src/main/java/com/capstone/BnagFer/global/common/ErrorCode.java b/src/main/java/com/capstone/BnagFer/global/common/ErrorCode.java
index adbdf5c0..a47994c2 100644
--- a/src/main/java/com/capstone/BnagFer/global/common/ErrorCode.java
+++ b/src/main/java/com/capstone/BnagFer/global/common/ErrorCode.java
@@ -31,6 +31,7 @@ public enum ErrorCode implements BaseErrorCode {
     EMAIL_NOT_MATCH(HttpStatus.BAD_REQUEST, "USER414", "이메일이 맞지 않습니다."),
     CANNOT_USE_SAME_PASSWORD(HttpStatus.BAD_REQUEST, "USER415", "기존 비밀번호와 동일합니다."),
     USER_IS_BANNED(HttpStatus.BAD_REQUEST, "USER416", "사용이 정지된 유저입니다."),
+    EMAIL_ALREADY_EXIST(HttpStatus.BAD_REQUEST, "USER417", "해당 이메일이 이미 존재합니다."),
 
     // Firebase 관련 에러
     FIREBASE_MESSAGING_ERROR(HttpStatus.INTERNAL_SERVER_ERROR, "FIREBASE401", "Firebase 메시징 예외가 발생했습니다."),
@@ -47,7 +48,6 @@ public enum ErrorCode implements BaseErrorCode {
     PROFILE_ALREADY_EXIST(HttpStatus.BAD_REQUEST, "PROFILE402", "프로필이 이미 존재합니다."),
     PROFILE_NOT_FOUND(HttpStatus.BAD_REQUEST, "PROFILE403", "해당 프로필이 존재하지 않습니다."),
     PROFILE_AND_USER_NOT_MATCHED(HttpStatus.BAD_REQUEST, "PROFILE404", "자신의 프로필이 아닙니다. 권한이 없습니다."),
-    EMAIL_ALREADY_EXIST(HttpStatus.BAD_REQUEST, "PROFILE404", "해당 이메일이 이미 존재합니다."),
 
     // Tactic 관련 에러
     TACTIC_NOT_FOUND(HttpStatus.BAD_REQUEST, "TACTIC401", "전술이 없습니다."),
diff --git a/src/main/java/com/capstone/BnagFer/global/config/SecurityConfig.java b/src/main/java/com/capstone/BnagFer/global/config/SecurityConfig.java
index d65c908c..1adf7b76 100644
--- a/src/main/java/com/capstone/BnagFer/global/config/SecurityConfig.java
+++ b/src/main/java/com/capstone/BnagFer/global/config/SecurityConfig.java
@@ -32,7 +32,7 @@ public class SecurityConfig {
 
     private final String[] swaggerUrls = {"/swagger-ui/**", "/v3/**"};
     private final String[] authUrls = {"/", "/accounts/signup/**", "/accounts/social/**", "/accounts/login/**",
-            "/api/v1/auth", "/oauth/kakao/**", "/accounts/reissue/**", "/accounts/forgotPw/**", "/accounts/email/send-email", "/accounts/email/verify"};
+            "/api/v1/auth", "/oauth/kakao/**", "/accounts/reissue/**", "/accounts/forgotPw/**", "/accounts/email/send-email", "/accounts/email/verify", "/accounts/checkEmail", "/accounts/recover/**"};
     private final String[] allowedUrls = Stream.concat(Arrays.stream(swaggerUrls), Arrays.stream(authUrls))
             .toArray(String[]::new);
 
diff --git a/src/main/java/com/capstone/BnagFer/global/util/RedisUtil.java b/src/main/java/com/capstone/BnagFer/global/util/RedisUtil.java
index 6cf71761..ef1ace2d 100644
--- a/src/main/java/com/capstone/BnagFer/global/util/RedisUtil.java
+++ b/src/main/java/com/capstone/BnagFer/global/util/RedisUtil.java
@@ -1,19 +1,26 @@
 package com.capstone.BnagFer.global.util;
+
 import lombok.RequiredArgsConstructor;
 import org.springframework.data.redis.core.RedisTemplate;
 import org.springframework.stereotype.Component;
 import java.util.concurrent.TimeUnit;
+
 @Component
 @RequiredArgsConstructor
 public class RedisUtil {
     private final RedisTemplate<String, Object> redisTemplate;
+    private static final long ONE_WEEK_IN_SECONDS = 7 * 24 * 60 * 60; // 일주일을 초로 표현
 
     public void save(String key, Object val, Long time, TimeUnit timeUnit) {
         redisTemplate.opsForValue().set(key, val, time, timeUnit);
     }
 
+    private void saveWithOneWeekTTL(String key, Object val) {
+        redisTemplate.opsForValue().set(key, val, ONE_WEEK_IN_SECONDS, TimeUnit.SECONDS);
+    }
+
     public void saveLikeCount(Long tacticId, Long likeCount) {
-        redisTemplate.opsForValue().set("tactic:" + tacticId + ":likeCount", likeCount.toString());
+        saveWithOneWeekTTL("tactic:" + tacticId + ":likeCount", likeCount.toString());
     }
 
     public Long getLikeCount(Long tacticId) {
@@ -22,7 +29,7 @@ public Long getLikeCount(Long tacticId) {
     }
 
     public void boardSaveLikeCount(Long boardId, Long likeCount) {
-        redisTemplate.opsForValue().set("board:" + boardId + ":likeCount", likeCount.toString());
+        saveWithOneWeekTTL("board:" + boardId + ":likeCount", likeCount.toString());
     }
 
     public Long boardGetLikeCount(Long boardId) {
@@ -31,19 +38,19 @@ public Long boardGetLikeCount(Long boardId) {
     }
 
     public void boardSaveCommentCount(Long boardId, Long commentCount) {
-        redisTemplate.opsForValue().set("board:" + boardId + ":commentCount", commentCount.toString());
+        saveWithOneWeekTTL("board:" + boardId + ":commentCount", commentCount.toString());
     }
 
-    public Long boardGetCommentCount(Long boardId){
+    public Long boardGetCommentCount(Long boardId) {
         String commentCountStr = (String) redisTemplate.opsForValue().get("board:" + boardId + ":commentCount");
         return commentCountStr != null ? Long.valueOf(commentCountStr) : null;
     }
 
-    public void saveCommentCount(Long tacticId, Long commentCount){
-        redisTemplate.opsForValue().set("tactic:" + tacticId + ":commentCount", commentCount.toString());
+    public void saveCommentCount(Long tacticId, Long commentCount) {
+        saveWithOneWeekTTL("tactic:" + tacticId + ":commentCount", commentCount.toString());
     }
 
-    public Long getCommentCount(Long tacticId){
+    public Long getCommentCount(Long tacticId) {
         String commentCountStr = (String) redisTemplate.opsForValue().get("tactic:" + tacticId + ":commentCount");
         return commentCountStr != null ? Long.valueOf(commentCountStr) : null;
     }
@@ -64,6 +71,7 @@ public void saveFCMToken(String userEmail, String fcmToken) {
         redisTemplate.opsForValue().set(userEmail, fcmToken);
         redisTemplate.expire(userEmail, 30, TimeUnit.DAYS);
     }
+
     public String getFCMToken(String userEmail) {
         Object tokenObj = redisTemplate.opsForValue().get(userEmail);
         if (tokenObj != null) {
@@ -72,6 +80,7 @@ public String getFCMToken(String userEmail) {
             return null;
         }
     }
+
     public void removeFCMToken(String userEmail) {
         redisTemplate.delete(userEmail);
     }