diff --git a/pom.xml b/pom.xml
index c25209f..d6039b8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -53,6 +53,11 @@
 			<artifactId>modelmapper</artifactId>
 			<version>2.3.8</version>
 		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-validation</artifactId>
+		</dependency>
 	</dependencies>
 
 	<build>
diff --git a/src/main/java/kb/wgwg/controller/UserController.java b/src/main/java/kb/wgwg/controller/UserController.java
index 5546fea..5c2d990 100644
--- a/src/main/java/kb/wgwg/controller/UserController.java
+++ b/src/main/java/kb/wgwg/controller/UserController.java
@@ -8,13 +8,17 @@
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
+import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
 
 import javax.persistence.EntityNotFoundException;
+import javax.validation.constraints.Email;
+import javax.validation.constraints.NotEmpty;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+@Validated
 @RestController
 @RequiredArgsConstructor
 @RequestMapping(value = "/users")
@@ -44,20 +48,24 @@ public ResponseEntity<BaseResponseDTO> readById(@RequestBody UserReadRequestDTO
         return ResponseEntity.ok(result2);
     }
 
-
     @GetMapping("/{email}/check/email")
-    public ResponseEntity<BaseResponseDTO> checkEmailDup(@PathVariable String email){
+    public ResponseEntity<BaseResponseDTO> checkEmailDup(@PathVariable @Email @NotEmpty String email){
         BaseResponseDTO result = new BaseResponseDTO<>();
+
         if(userService.checkEmailDup(email)){
             result.setStatus(404);
             result.setSuccess(false);
             result.setMessage("이메일 중복.");
-        }else{
+
+        } else{
             result.setStatus(200);
             result.setSuccess(true);
             result.setMessage("이메일 사용 가능.");
+
+            return ResponseEntity.ok(result);
         }
-        return ResponseEntity.ok(result);
+
+        return ResponseEntity.badRequest().body(result);
     }
 
     @GetMapping("/{nickName}/check/nickname")
@@ -67,29 +75,37 @@ public ResponseEntity<BaseResponseDTO> checkNickNameDup(@PathVariable String nic
             result.setStatus(404);
             result.setSuccess(false);
             result.setMessage("닉네임 중복.");
-        }else{
+
+        } else{
             result.setStatus(200);
             result.setSuccess(true);
             result.setMessage("닉네임 사용 가능.");
+
+            return ResponseEntity.ok(result);
         }
-        return ResponseEntity.ok(result);
+
+        return ResponseEntity.badRequest().body(result);
     }
 
     @PostMapping("/insert")
     public ResponseEntity<BaseResponseDTO> insert(@RequestBody UserInsertRequestDTO dto){
         BaseResponseDTO<UserReadResponseDTO> result = new BaseResponseDTO<>();
+
         try{
             UserReadResponseDTO insertResult = userService.insertUser(dto);
             result.setMessage("유저 등록 완료.");
             result.setStatus(200);
             result.setSuccess(true);
             result.setData(insertResult);
+
+            return ResponseEntity.ok(result);
         } catch (Exception e){
             result.setMessage(e.getMessage());
             result.setSuccess(false);
             result.setStatus(500);
+
+            return ResponseEntity.internalServerError().body(result);
         }
-        return ResponseEntity.ok(result);
     }
 
     @DeleteMapping(value = "/delete/{id}")
diff --git a/src/main/java/kb/wgwg/service/NChallengeService.java b/src/main/java/kb/wgwg/service/NChallengeService.java
index 3e1dea5..732a988 100644
--- a/src/main/java/kb/wgwg/service/NChallengeService.java
+++ b/src/main/java/kb/wgwg/service/NChallengeService.java
@@ -14,6 +14,7 @@
 
 import javax.persistence.EntityManager;
 import javax.persistence.EntityNotFoundException;
+import java.time.LocalDateTime;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.function.Function;
@@ -36,13 +37,28 @@ public NChallengeInsertResponseDTO insertNChallenge(NChallengeInsertRequestDTO d
                 () -> new EntityNotFoundException("해당 사용자를 찾을 수 없습니다.")
         );
 
+        LocalDateTime currentDate = LocalDateTime.now();
+        LocalDateTime endDate = dto.getStartDate().plusDays(6);
+
+        String status;
+
+        // 현재 날짜와 startDate, endDate 비교하여 상태 설정
+        if (currentDate.isBefore(dto.getStartDate())) {
+            status = "모집중";
+        } else if (currentDate.isEqual(dto.getStartDate()) ||
+                (currentDate.isAfter(dto.getStartDate()) && currentDate.isBefore(endDate))) {
+            status = "진행중";
+        } else {
+            status = "종료";
+        }
+
         NChallengeInsertEndDateRequestDTO finalDto = NChallengeInsertEndDateRequestDTO.builder()
                 .ownerId(dto.getOwnerId())
                 .title(dto.getTitle())
                 .description(dto.getDescription())
-                .status(dto.getStatus())
+                .status(status)
                 .startDate(dto.getStartDate())
-                .endDate(dto.getStartDate().plusDays(7))
+                .endDate(dto.getStartDate().plusDays(6))
                 .deposit(dto.getDeposit())
                 .limitAmount(dto.getLimitAmount())
                 .account(dto.getAccount())