diff --git a/src/main/java/com/lesso/neverland/group/application/GroupService.java b/src/main/java/com/lesso/neverland/group/application/GroupService.java
index 44da444..1754756 100644
--- a/src/main/java/com/lesso/neverland/group/application/GroupService.java
+++ b/src/main/java/com/lesso/neverland/group/application/GroupService.java
@@ -170,7 +170,7 @@ public BaseResponse<String> withdrawGroup(Long groupIdx) {
 
     // 그룹 생성
     @Transactional(rollbackFor = Exception.class)
-    public BaseResponse<String> createGroup(MultipartFile image, CreateGroupRequest createGroupRequest) throws IOException {
+    public BaseResponse<CreateGroupResponse> createGroup(MultipartFile image, CreateGroupRequest createGroupRequest) throws IOException {
         User admin = userRepository.findById(userService.getUserIdxWithValidation()).orElseThrow(() -> new BaseException(INVALID_USER_IDX));
 
         // upload image
@@ -192,14 +192,8 @@ public BaseResponse<String> createGroup(MultipartFile image, CreateGroupRequest
         newUserTeam.setTeam(group);
         userTeamRepository.save(newUserTeam);
 
-//        for (Long memberIdx : createGroupRequest.memberList()) {
-//            User member = userRepository.findById(memberIdx).orElseThrow(() -> new BaseException(INVALID_USER_IDX));
-//            UserTeam userTeam = new UserTeam(member, group);
-//            userTeam.setUser(member);
-//            userTeam.setTeam(group);
-//            userTeamRepository.save(userTeam);
-//        }
-        return new BaseResponse<>(SUCCESS);
+        CreateGroupResponse createGroupResponse = new CreateGroupResponse(joinCode);
+        return new BaseResponse<>(createGroupResponse);
     }
 
     // [관리자] 그룹 초대하기
diff --git a/src/main/java/com/lesso/neverland/group/dto/CreateGroupResponse.java b/src/main/java/com/lesso/neverland/group/dto/CreateGroupResponse.java
new file mode 100644
index 0000000..00a32ef
--- /dev/null
+++ b/src/main/java/com/lesso/neverland/group/dto/CreateGroupResponse.java
@@ -0,0 +1,3 @@
+package com.lesso.neverland.group.dto;
+
+public record CreateGroupResponse(Integer joinCode) {}
diff --git a/src/main/java/com/lesso/neverland/group/presentation/GroupController.java b/src/main/java/com/lesso/neverland/group/presentation/GroupController.java
index bb8cd25..7a35e45 100644
--- a/src/main/java/com/lesso/neverland/group/presentation/GroupController.java
+++ b/src/main/java/com/lesso/neverland/group/presentation/GroupController.java
@@ -62,7 +62,7 @@ public BaseResponse<String> withdrawGroup(@PathVariable Long groupIdx) {
 
     // 그룹 생성
     @PostMapping("/create")
-    public BaseResponse<String> createGroup(@RequestPart MultipartFile image, @RequestPart CreateGroupRequest createGroupRequest) {
+    public BaseResponse<CreateGroupResponse> createGroup(@RequestPart MultipartFile image, @RequestPart CreateGroupRequest createGroupRequest) {
         try {
             return groupService.createGroup(image, createGroupRequest);
         } catch (IOException e) {
diff --git a/src/main/java/com/lesso/neverland/puzzle/application/PuzzleService.java b/src/main/java/com/lesso/neverland/puzzle/application/PuzzleService.java
index a2861fb..ed42786 100644
--- a/src/main/java/com/lesso/neverland/puzzle/application/PuzzleService.java
+++ b/src/main/java/com/lesso/neverland/puzzle/application/PuzzleService.java
@@ -79,13 +79,19 @@ private static List<GroupPuzzleDto> getGroupPuzzleDtos(List<Puzzle> groupPuzzleL
     // 퍼즐 상세 조회
     public BaseResponse<PuzzleDetailResponse> getPuzzleDetail(Long groupIdx, Long puzzleIdx) {
         Team group = groupRepository.findById(groupIdx).orElseThrow(() -> new BaseException(INVALID_GROUP_IDX));
+        User user = userRepository.findById(userService.getUserIdxWithValidation()).orElseThrow(() -> new BaseException(INVALID_USER_IDX));
         Puzzle puzzle = puzzleRepository.findById(puzzleIdx).orElseThrow(() -> new BaseException(INVALID_PUZZLE_IDX));
+
         if (!puzzle.getTeam().equals(group)) throw new BaseException(NO_GROUP_PUZZLE);
         if (puzzle.getStatus().equals(INACTIVE)) throw new BaseException(ALREADY_DELETED_PUZZLE);
 
+        boolean isWriter = puzzle.getUser().equals(user);
+        boolean hasWrite = puzzlePieceRepository.existsByPuzzleAndUser(puzzle, user);
+
         PuzzleDetailResponse puzzleDetail = new PuzzleDetailResponse(puzzle.getLocation(), puzzle.getPuzzleImage(),
                 puzzle.getPuzzleDate().toString(), puzzle.getUser().getProfile().getNickname(), puzzle.getTitle(), puzzle.getContent(),
-                getMemberImageList(puzzle), puzzle.getPuzzleMembers().size(), getPuzzlePieceList(puzzle));
+                getMemberImageList(puzzle), puzzle.getPuzzleMembers().size(), puzzle.getPuzzlePieces().size()+1, isWriter, hasWrite,
+                getPuzzlePieceList(puzzle));
         return new BaseResponse<>(puzzleDetail);
     }
 
@@ -160,13 +166,12 @@ private Puzzle createPuzzle(CreatePuzzleRequest createPuzzleRequest, Team group,
     }
 
     // [작성자] 퍼즐 수정
-    public BaseResponse<String> editPuzzle(Long groupIdx, Long puzzleIdx, MultipartFile image, EditPuzzleRequest editPuzzleRequest) {
+    public BaseResponse<String> editPuzzle(Long groupIdx, Long puzzleIdx, MultipartFile newImage, EditPuzzleRequest editPuzzleRequest) {
         User user = userRepository.findById(userService.getUserIdxWithValidation()).orElseThrow(() -> new BaseException(INVALID_USER_IDX));
         Puzzle puzzle = puzzleRepository.findById(puzzleIdx).orElseThrow(() -> new BaseException(INVALID_PUZZLE_IDX));
         validateWriter(user, puzzle);
 
 
-
         return new BaseResponse<>(SUCCESS);
     }
 
diff --git a/src/main/java/com/lesso/neverland/puzzle/dto/PuzzleDetailResponse.java b/src/main/java/com/lesso/neverland/puzzle/dto/PuzzleDetailResponse.java
index 292c804..039d18c 100644
--- a/src/main/java/com/lesso/neverland/puzzle/dto/PuzzleDetailResponse.java
+++ b/src/main/java/com/lesso/neverland/puzzle/dto/PuzzleDetailResponse.java
@@ -9,4 +9,7 @@ public record PuzzleDetailResponse(String location,
                                    String content,
                                    List<String> memberImageList, // 3명만
                                    Integer memberCount,
+                                   Integer writeCount, // PuzzlePieceCount+1
+                                   boolean isWriter,
+                                   boolean hasWrite, // 해당 user가 퍼즐피스 작성했는지 여부
                                    List<PuzzlePieceDto> puzzlePieces) {}
diff --git a/src/main/java/com/lesso/neverland/puzzle/repository/PuzzlePieceRepository.java b/src/main/java/com/lesso/neverland/puzzle/repository/PuzzlePieceRepository.java
index c1b9581..428ab28 100644
--- a/src/main/java/com/lesso/neverland/puzzle/repository/PuzzlePieceRepository.java
+++ b/src/main/java/com/lesso/neverland/puzzle/repository/PuzzlePieceRepository.java
@@ -1,7 +1,10 @@
 package com.lesso.neverland.puzzle.repository;
 
+import com.lesso.neverland.puzzle.domain.Puzzle;
 import com.lesso.neverland.puzzle.domain.PuzzlePiece;
+import com.lesso.neverland.user.domain.User;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface PuzzlePieceRepository extends JpaRepository<PuzzlePiece, Long> {
+    boolean existsByPuzzleAndUser(Puzzle puzzle, User user);
 }