diff --git a/src/casdoor/async_main.py b/src/casdoor/async_main.py
index e40f40e..27c070c 100644
--- a/src/casdoor/async_main.py
+++ b/src/casdoor/async_main.py
@@ -462,3 +462,107 @@ async def update_user(self, user: User) -> Dict:
     async def delete_user(self, user: User) -> Dict:
         response = await self.modify_user("delete-user", user)
         return response
+
+    async def get_roles(self) -> List[Dict]:
+        """
+        Get all roles from Casdoor for the configured organization.
+
+        :return: list of role dicts
+        """
+        path = "/api/get-roles"
+        params = {"owner": self.org_name}
+        async with self._session as session:
+            response = await session.get(path, headers=self.headers, params=params)
+            if response.get("status") != "ok":
+                raise Exception(response.get("msg", "Failed to get roles"))
+            return response.get("data", [])
+
+    async def get_role(self, role_name: str) -> Dict:
+        """
+        Get a specific role from Casdoor.
+
+        :param role_name: the name of the role
+        :return: role dict
+        """
+        path = "/api/get-role"
+        params = {"id": f"{self.org_name}/{role_name}"}
+        async with self._session as session:
+            response = await session.get(path, headers=self.headers, params=params)
+            if response.get("status") != "ok":
+                raise Exception(response.get("msg", f"Role {role_name} not found"))
+            return response.get("data")
+
+    async def update_role(self, role: Dict) -> Dict:
+        """
+        Update a role in Casdoor.
+
+        :param role: role dict with updated data
+        :return: response dict with status
+        """
+        path = "/api/update-role"
+        params = {"id": f"{role['owner']}/{role['name']}"}
+        async with self._session as session:
+            response = await session.post(path, params=params, headers=self.headers, json=role)
+            if response.get("status") != "ok":
+                raise Exception(response.get("msg", "Failed to update role"))
+            return response
+
+    async def assign_role_to_user(self, username: str, role_name: str) -> Dict:
+        """
+        Assign a role to a user by adding the user to the role's users list.
+
+        :param username: the username to assign the role to
+        :param role_name: the name of the role to assign
+        :return: response dict with status
+        """
+        user_id = f"{self.org_name}/{username}"
+
+        role = await self.get_role(role_name)
+        if not role:
+            raise Exception(f"Role {role_name} not found")
+
+        if not role.get("users"):
+            role["users"] = []
+
+        if user_id not in role["users"]:
+            role["users"].append(user_id)
+            return await self.update_role(role)
+
+        return {"status": "ok", "msg": "User already has this role"}
+
+    async def remove_role_from_user(self, username: str, role_name: str) -> Dict:
+        """
+        Remove a role from a user by removing the user from the role's users list.
+
+        :param username: the username to remove the role from
+        :param role_name: the name of the role to remove
+        :return: response dict with status
+        """
+        user_id = f"{self.org_name}/{username}"
+
+        role = await self.get_role(role_name)
+        if not role:
+            raise Exception(f"Role {role_name} not found")
+
+        if role.get("users") and user_id in role["users"]:
+            role["users"].remove(user_id)
+            return await self.update_role(role)
+
+        return {"status": "ok", "msg": "User does not have this role"}
+
+    async def get_user_roles(self, username: str) -> List[Dict]:
+        """
+        Get all roles assigned to a user.
+
+        :param username: the username to get roles for
+        :return: list of role dicts assigned to the user
+        """
+        user_id = f"{self.org_name}/{username}"
+        all_roles = await self.get_roles()
+
+        user_roles = []
+        for role in all_roles:
+            if role.get("users") and user_id in role["users"]:
+                user_roles.append(role)
+
+        return user_roles
diff --git a/src/casdoor/role.py b/src/casdoor/role.py
index c2238b1..76e51bb 100644
--- a/src/casdoor/role.py
+++ b/src/casdoor/role.py
@@ -125,3 +125,63 @@ def update_role(self, role: Role) -> Dict:
     def delete_role(self, role: Role) -> Dict:
         response = self.modify_role("delete-role", role)
         return response
+
+    def assign_role_to_user(self, username: str, role_name: str) -> Dict:
+        """
+        Assign a role to a user by adding the user to the role's users list.
+
+        :param username: the username to assign the role to
+        :param role_name: the name of the role to assign
+        :return: response dict with status
+        """
+        user_id = f"{self.org_name}/{username}"
+
+        role = self.get_role(role_name)
+        if role is None:
+            raise Exception(f"Role {role_name} not found")
+
+        if not hasattr(role, "users") or role.users is None:
+            role.users = []
+
+        if user_id not in role.users:
+            role.users.append(user_id)
+            return self.update_role(role)
+
+        return {"status": "ok", "msg": "User already has this role"}
+
+    def remove_role_from_user(self, username: str, role_name: str) -> Dict:
+        """
+        Remove a role from a user by removing the user from the role's users list.
+
+        :param username: the username to remove the role from
+        :param role_name: the name of the role to remove
+        :return: response dict with status
+        """
+        user_id = f"{self.org_name}/{username}"
+
+        role = self.get_role(role_name)
+        if role is None:
+            raise Exception(f"Role {role_name} not found")
+
+        if hasattr(role, "users") and role.users and user_id in role.users:
+            role.users.remove(user_id)
+            return self.update_role(role)
+
+        return {"status": "ok", "msg": "User does not have this role"}
+
+    def get_user_roles(self, username: str) -> List[Role]:
+        """
+        Get all roles assigned to a user.
+
+        :param username: the username to get roles for
+        :return: list of Role objects assigned to the user
+        """
+        user_id = f"{self.org_name}/{username}"
+        all_roles = self.get_roles()
+
+        user_roles = []
+        for role in all_roles:
+            if hasattr(role, "users") and role.users and user_id in role.users:
+                user_roles.append(role)
+
+        return user_roles