diff --git a/src/main/java/com/wedit/weditapp/domain/member/controller/MemberController.java b/src/main/java/com/wedit/weditapp/domain/member/controller/MemberController.java
index f9bf39e..22459b9 100644
--- a/src/main/java/com/wedit/weditapp/domain/member/controller/MemberController.java
+++ b/src/main/java/com/wedit/weditapp/domain/member/controller/MemberController.java
@@ -16,7 +16,6 @@
 import org.springframework.web.bind.annotation.*;
 
 import java.util.List;
-import java.util.stream.Collectors;
 
 @RestController
 @RequestMapping("/api/members")
@@ -33,11 +32,9 @@ public class MemberController {
             @ApiResponse(responseCode = "500", description = "서버 에러")
     })
     @PostMapping("/signup")
-    public ResponseEntity<GlobalResponseDto<MemberResponseDto>>
-    createMember(
-    @Valid @RequestBody MemberRequestDto requestDto) {
-        Member saved = memberService.createMember(requestDto);
-
+    public ResponseEntity<GlobalResponseDto<MemberResponseDto>> createMember(
+        @Valid @RequestBody MemberRequestDto requestDto) {
+        memberService.createMember(requestDto); // 반환값 사용 X -> 추후 OAuth2 구현하면서 변동 가능성 O
         return ResponseEntity.status(HttpStatus.OK).body(GlobalResponseDto.success());
     }
 
@@ -50,9 +47,8 @@ public class MemberController {
             @ApiResponse(responseCode = "500", description = "서버 에러")
     })
     @PostMapping("/login")
-    public ResponseEntity<GlobalResponseDto<String>>
-    login(
-    @RequestBody LoginRequestDto loginRequest) {
+    public ResponseEntity<GlobalResponseDto<String>> login(
+        @RequestBody LoginRequestDto loginRequest) {
         // 로그인 로직 → 토큰 발급
         String token = memberService.login(loginRequest);
 
@@ -81,10 +77,8 @@ public ResponseEntity<GlobalResponseDto<List<MemberResponseDto>>> findAllMembers
             @ApiResponse(responseCode = "500", description = "서버 에러")
     })
     @GetMapping("/{userId}")
-    public ResponseEntity<GlobalResponseDto<MemberResponseDto>>
-    findMemberById(
-    @PathVariable Long userId) {
-        MemberResponseDto memberResponse = memberService.findMemberById(userId);
-        return ResponseEntity.ok(GlobalResponseDto.success(memberResponse));
+    public ResponseEntity<GlobalResponseDto<MemberResponseDto>> findMemberById(
+        @PathVariable Long userId) {
+        return ResponseEntity.ok(GlobalResponseDto.success(memberService.findMember(userId)));
     }
 }
\ No newline at end of file
diff --git a/src/main/java/com/wedit/weditapp/domain/member/dto/MemberResponseDto.java b/src/main/java/com/wedit/weditapp/domain/member/dto/MemberResponseDto.java
index d4d49d5..3388c46 100644
--- a/src/main/java/com/wedit/weditapp/domain/member/dto/MemberResponseDto.java
+++ b/src/main/java/com/wedit/weditapp/domain/member/dto/MemberResponseDto.java
@@ -17,14 +17,22 @@ public class MemberResponseDto {
     private MemberStatus status;
 
     @Builder
+    private MemberResponseDto(Long id, String email, String name, MemberRole role, MemberStatus status) {
+        this.id = id;
+        this.email = email;
+        this.name = name;
+        this.role = role;
+        this.status = status;
+    }
+
     public static MemberResponseDto from(Member member) {
-        MemberResponseDto responseDto = new MemberResponseDto();
-        responseDto.id = member.getId();
-        responseDto.email = member.getEmail();
-        responseDto.name = member.getName();
-        responseDto.role = member.getRole();
-        responseDto.status = member.getStatus();
-        return responseDto;
+        return MemberResponseDto.builder()
+                .id(member.getId())
+                .email(member.getEmail())
+                .name(member.getName())
+                .role(member.getRole())
+                .status(member.getStatus())
+                .build();
     }
 }
 
diff --git a/src/main/java/com/wedit/weditapp/domain/member/service/MemberService.java b/src/main/java/com/wedit/weditapp/domain/member/service/MemberService.java
index 6fd3a9a..1e01958 100644
--- a/src/main/java/com/wedit/weditapp/domain/member/service/MemberService.java
+++ b/src/main/java/com/wedit/weditapp/domain/member/service/MemberService.java
@@ -25,7 +25,7 @@ public class MemberService {
     // [회원가입 관련] - 이미 존재하는 이메일인지 검사 + Member 엔티티 생성 + DB저장 및 반환
     public Member createMember(MemberRequestDto requestDto) {
         if (memberRepository.findByEmail(requestDto.getEmail()).isPresent()) {
-            throw new CommonException(ErrorCode.MEMBER_ALREADY_EXISTS);
+            throw new CommonException(ErrorCode.EMAIL_ALREADY_EXISTS);
         }
 
         Member member = Member.createUser(
@@ -54,7 +54,7 @@ public List<MemberResponseDto> findAllMembers() {
     }
 
     // [단일 회원 조회]
-    public MemberResponseDto findMemberById(Long userId) {
+    public MemberResponseDto findMember(Long userId) {
         Member member = memberRepository.findById(userId)
                 .orElseThrow(() -> new CommonException(ErrorCode.USER_NOT_FOUND));
         return MemberResponseDto.from(member);
diff --git a/src/main/java/com/wedit/weditapp/global/error/ErrorCode.java b/src/main/java/com/wedit/weditapp/global/error/ErrorCode.java
index 8ed47ee..5c8f38e 100644
--- a/src/main/java/com/wedit/weditapp/global/error/ErrorCode.java
+++ b/src/main/java/com/wedit/weditapp/global/error/ErrorCode.java
@@ -19,7 +19,8 @@ public enum ErrorCode {
 	//회원
 	LOGIN_FAIL(401, "LOGIN_FAIL", "로그인에 실패하였습니다."),
 	USER_NOT_FOUND(404, "USER_NOT_FOUND", "유저를 찾을 수 없습니다."),
-	MEMBER_ALREADY_EXISTS(409, "MEMBER_ALREADY_EXISTS", "이미 가입된 이메일입니다."),
+	MEMBER_ALREADY_EXISTS(409, "MEMBER_ALREADY_EXISTS", "이미 존재하는 회원입니다."),
+	EMAIL_ALREADY_EXISTS(409, "EMAIL_ALREADY_EXISTS", "이미 가입된 이메일입니다."),
 	DUPLICATE_NICKNAME(409, "NICKNAME_ALREADY_EXISTS", "이미 존재하는 닉네임입니다."),
 
 	//작업