diff --git a/app/grad_2025/router.py b/app/grad_2025/router.py
index 8add821..2004e7c 100644
--- a/app/grad_2025/router.py
+++ b/app/grad_2025/router.py
@@ -40,12 +40,12 @@ async def search_grad_2025_posts(
         str | None,
         Query(description="Base64 인코딩된 커서 (응답의 next_cursor 값)"),
     ] = None,
-    category: Category | None = Query(None),
-    univ_major: str | None = Query(None),
+    categories: list[Category] | None = Query(default=None),
+    univ_majors: list[str] | None = Query(default=None),
 ) -> Page[PostCompactRead]:
     decoded_cursor = Grad2025Cursor.decode(cursor)
     return await grad_2025_service.search_posts(
         cursor=decoded_cursor,
-        category=category,
-        univ_major=univ_major,
+        categories=categories,
+        univ_majors=univ_majors,
     )
diff --git a/app/grad_2025/service.py b/app/grad_2025/service.py
index e715e42..6ec98cd 100644
--- a/app/grad_2025/service.py
+++ b/app/grad_2025/service.py
@@ -24,15 +24,15 @@ async def search_posts(
         *,
         cursor: Grad2025Cursor | None,
         limit: int = POST_CURSOR_LIMIT,
-        category: Category | None = None,
-        univ_major: str | None = None,
+        categories: list[Category] | None = None,
+        univ_majors: list[str] | None = None,
     ) -> Page[PostCompactRead]:
         cursor_id = cursor.id if cursor else None
         posts = await self.post_repository.find_grad_2025_posts(
             cursor=cursor_id,
             limit=limit,
-            category=category,
-            univ_major=univ_major,
+            categories=categories,
+            univ_majors=univ_majors,
         )
         compact_posts = [PostCompactRead.from_post(post) for post in posts]
         next_cursor = (
diff --git a/app/posts/repository.py b/app/posts/repository.py
index c2f09fa..b68aa9b 100644
--- a/app/posts/repository.py
+++ b/app/posts/repository.py
@@ -287,8 +287,8 @@ async def find_grad_2025_posts(
         *,
         cursor: int | None,
         limit: int,
-        category: Category | None = None,
-        univ_major: str | None = None,
+        categories: list[Category] | None = None,
+        univ_majors: list[str] | None = None,
     ) -> list[Post]:
         """post_grad_2025_table에 존재하는 Post만 조회합니다."""
         stmt = (
@@ -315,13 +315,13 @@ async def find_grad_2025_posts(
                 )
             )
 
-        if category is not None:
-            stmt = stmt.where(Post.category == category)
+        if categories is not None:
+            stmt = stmt.where(Post.category.in_(categories))
 
-        if univ_major is not None:
+        if univ_majors is not None:
             stmt = stmt.join(
                 Grad2025, post_grad_2025_table.c.grad_2025_id == Grad2025.id
-            ).where(Grad2025.name == univ_major)
+            ).where(Grad2025.name.in_(univ_majors))
 
         result = await self.session.scalars(stmt)
         return list(result.unique().all())