diff --git a/users/services.py b/users/services.py
new file mode 100644
index 0000000..9ea3ba6
--- /dev/null
+++ b/users/services.py
@@ -0,0 +1,85 @@
+from .models import *
+from projects.models import *
+from portfolios.models import *
+
+from django.utils import timezone
+from datetime import timedelta
+
+# 30일 이전 일수 계산
+thirty_days_ago = timezone.now() - timedelta(days=30)
+
+class CheckUserFieldDuplicateService:
+    @staticmethod
+    def check_nickname_duplicate(query):
+        pass
+
+    @staticmethod
+    def check_custom_url_duplicate():
+        pass
+
+# 알림 관련 서비스 로직
+class NotifiationService:
+    @staticmethod
+    def set_content_by_type():
+        pass
+
+
+class UserToNotificationService:
+    @staticmethod
+    def get_new_notification_count(user: User):
+        return user.notifications.filter(created_at__lt=thirty_days_ago, is_read=False).count()
+    
+    @staticmethod
+    def get_all_notification(user: User):
+        return user.notifications.filter(created_at__lt=thirty_days_ago)
+    
+
+# 유저 -> 포트폴리오 관련 서비스 로직
+class UserToPortfolioService:
+    @staticmethod
+    def get_represent_portfolio(user: User):
+        if represent_portfolio := user.owned_portfolios.filter(is_represent=True).first():
+            return represent_portfolio.id
+        else:
+            return None
+        
+    @staticmethod
+    def get_published_portfolio(user: User):
+        return user.owned_portfolios.filter(is_published=True)
+
+    @staticmethod
+    def get_unpublished_portfolio(user: User):
+        return user.owned_portfolios.filter(is_published=False)
+    
+    @staticmethod
+    def get_scrap_portfolio(user: User):
+        return user.scrapped_portfolios.filter(is_published=True)
+
+# 유저 -> 프로젝트 관련 서비스 로직
+class UserToProjectService:
+    @staticmethod
+    def get_published_solo_project(user: User):
+        return user.owned_projects.filter(is_team=False, is_published=True)
+    
+    @staticmethod
+    def get_unpublished_solo_project(user: User):
+        return user.owned_projects.filter(is_team=False, is_published=False)
+    
+    @staticmethod
+    def get_published_team_project(user: User):
+        return Project.objects.filter(
+            team_project_member_list__user = user,
+            is_published=True
+        ).distinct()
+
+    @staticmethod
+    def get_unpublished_team_project(user: User):
+        return Project.objects.filter(
+            team_project_member_list__user = user,
+            is_published=False
+        ).distinct()
+    
+    @staticmethod
+    def get_scrap_project(user: User):
+        return user.scrapped_projects.filter(is_published=True)
+