diff --git a/employee_system.py b/employee_system.py
new file mode 100644
index 0000000..906a1c5
--- /dev/null
+++ b/employee_system.py
@@ -0,0 +1,82 @@
+import conn
+import operation
+
+
+def main():
+    logged_in = False  # 用于标记是否已经登录
+
+    while True:
+        print("欢迎使用员工管理系统！")
+
+        # 如果没有登录，提示用户先登录
+        if not logged_in:
+            print("请选择操作：")
+            print("1. 登录")
+        else:
+            print("请选择操作：")
+            print("2. 查询所有员工")
+            print("3. 查询员工信息")
+            print("4. 添加新员工")
+            print("5. 修改员工信息")
+            print("6. 删除员工")
+            print("7. 查询考勤记录")
+            print("8. 查询部门信息")
+            print("9. 查询假期申请")
+            print("10. 查询绩效考核")
+            print("11. 查询员工入职日期之后的员工")
+            print("12. 查询考勤状态")
+            print("13. 查询部门主管")
+            print("14. 退出系统")
+
+        choice = input("请输入操作编号：")
+
+        if choice == "1" and not logged_in:
+            # 登录操作
+            username = input("请输入用户名：")
+            password = input("请输入密码：")
+            # 假设 login 函数返回 True 表示登录成功
+            if operation.login(username, password):  # 假设 login 函数返回 True 表示登录成功
+                logged_in = True
+                print("登录成功！")
+            else:
+                print("登录失败，请重新尝试！")
+        elif logged_in:  # 只有登录后才能执行后续操作
+            if choice == "2":
+                operation.query_all_employees()
+            elif choice == "3":
+                operation.query_id()
+            elif choice == "4":
+                operation.add_employee()
+            elif choice == "5":
+                operation.update_employee()
+            elif choice == "6":
+                operation.delete_employee()
+            elif choice == "7":
+                employee_id = input("请输入员工ID查询考勤记录：")
+                operation.query_attendance_by_employee_id(employee_id)
+            elif choice == "8":
+                operation.query_employee_department()
+            elif choice == "9":
+                employee_id = input("请输入员工ID查询假期申请记录：")
+                operation.query_leave_requests_by_employee(employee_id)
+            elif choice == "10":
+                employee_id = input("请输入员工ID查询绩效考核记录：")
+                operation.query_performance_reviews_by_employee(employee_id)
+            elif choice == "11":
+                operation.query_employees_after_hire_date()
+            elif choice == "12":
+                operation.query_attendance_by_status()
+            elif choice == "13":
+                operation.query_department_manager()
+            elif choice == "14":
+                print("感谢使用员工管理系统！")
+                operation.close()
+                break
+            else:
+                print("无效选择，请重新输入！")
+        else:
+            print("无效选择，请重新输入！")
+
+
+if __name__ == "__main__":
+    main()
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