diff --git a/users/services.py b/users/services.py
index 8dee258..74182e3 100644
--- a/users/services.py
+++ b/users/services.py
@@ -8,14 +8,19 @@ from datetime import timedelta
 # 30일 이전 일수 계산
 thirty_days_ago = timezone.now() - timedelta(days=30)
 
+DUPLICATE_CHECK = {
+    'email': 'email',
+    'nickname': 'nickname'
+}
+
 class CheckUserFieldDuplicateService:
     @staticmethod
-    def check_nickname_duplicate(query):
-        pass
-
-    @staticmethod
-    def check_custom_url_duplicate():
-        pass
+    def check_duplicate(field: str, value: str) -> bool:
+        if field not in DUPLICATE_CHECK:
+            raise ValueError(f"{field}는 지원하지 않는 필드입니다.")
+        
+        filter_dict = {DUPLICATE_CHECK[field]:value}
+        return  User.objects.filter(**filter_dict).exists()
         
 
 
diff --git a/users/urls.py b/users/urls.py
index f7c8f47..3d84a25 100644
--- a/users/urls.py
+++ b/users/urls.py
@@ -9,7 +9,7 @@ urlpatterns = [
     path('refresh-token/', RefreshAPIView.as_view()),
     path('join/', JoinAPIView.as_view()),
     path('login/', LoginAPIView.as_view()),
-    path('check/', NicknameAPIView.as_view()),
+    path('check/', CheckUserFieldDuplicateAPIView.as_view()),
     path('portfolio-info/', SetPortofolioRequiredInfoAPIView.as_view()),
     path('portfolio-info/check/', SetPortofolioRequiredInfoAPIView.as_view()),
     path('teamtag/', TagUserAPIView.as_view()),
diff --git a/users/views.py b/users/views.py
index 3c10136..d51fbe5 100644
--- a/users/views.py
+++ b/users/views.py
@@ -4,7 +4,7 @@ from django.shortcuts import get_object_or_404
 
 from rest_framework.views import APIView
 from rest_framework.viewsets import ReadOnlyModelViewSet
-from rest_framework_simplejwt.serializers import TokenObtainPairSerializer, TokenRefreshSerializer
+from rest_framework_simplejwt.serializers import TokenObtainPairSerializer, TokenRefreshSerializer, TokenObtainSerializer
 from rest_framework_simplejwt.tokens import RefreshToken
 from rest_framework_simplejwt.exceptions import TokenError, InvalidToken
 
@@ -53,8 +53,12 @@ class JoinAPIView(APIView):
     def post(self, request):
         serializer = JoinSerializer(data=request.data)
         if serializer.is_valid():
-            serializer.save()
-            res = Response({"message": "회원가입이 완료되었습니다."}, status=status.HTTP_200_OK)
+            user = serializer.save()
+            access = str(RefreshToken.for_user(user).access_token)
+            res = Response({
+                "message": "회원가입이 완료되었습니다.",
+                "access": access
+                }, status=status.HTTP_200_OK)
             return res
         return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
     
@@ -95,18 +99,22 @@ class LoginAPIView(APIView):
         else: # id, 비번 둘 중 하나가 틀렸을 때
             return Response({"message": "아이디 혹은 비밀번호가 맞지 않습니다."}, status=status.HTTP_400_BAD_REQUEST)
 
-class NicknameAPIView(APIView):
+class CheckUserFieldDuplicateAPIView(APIView):
     permission_classes = [AllowAny]
-    # 닉네임 중복 체크
+    # 유저 필드 중복 확인
     def get(self, request):
-        nickname = request.GET.get('nickname', None)
-        if not nickname:
-            return Response({"message": "닉네임을 입력하세요."}, status=status.HTTP_400_BAD_REQUEST)
+        field = request.query_params.get('field')
+        value = request.query_params.get('value')
+        if not field or not value:
+            return Response({"message": "올바르지 않은 요청입니다."}, status=status.HTTP_400_BAD_REQUEST)
         try:
-            get_object_or_404(User, nickname=nickname)
-            return Response({"message": "해당 닉네임은 사용할 수 없습니다."}, status=status.HTTP_400_BAD_REQUEST)
-        except:
-            return Response({"message": "사용할 수 있는 닉네임입니다."}, status=status.HTTP_200_OK)
+            if CheckUserFieldDuplicateService.check_duplicate(field, value):
+                return Response({"message": f"존재하는 {field} 입니다."}, status=status.HTTP_400_BAD_REQUEST)
+            else:
+                return Response({"message": f"사용해도 되는 {field} 입니다."}, status=status.HTTP_200_OK)
+        except ValueError as e:
+            return Response({"message": str(e)}, status=status.HTTP_400_BAD_REQUEST)
+
         
 class TagUserAPIView(APIView):
     def get(self, request):