diff --git a/src/main/java/org/harang/server/repository/MemberInfoRepository.java b/src/main/java/org/harang/server/repository/MemberInfoRepository.java
new file mode 100644
index 0000000..d916c47
--- /dev/null
+++ b/src/main/java/org/harang/server/repository/MemberInfoRepository.java
@@ -0,0 +1,17 @@
+성package org.harang.server.repository;
+
+import java.util.Optional;
+import org.harang.server.domain.MemberInfo;
+import org.harang.server.dto.type.ErrorMessage;
+import org.harang.server.exception.CustomException;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface MemberInfoRepository extends JpaRepository<MemberInfo, Long> {
+    default MemberInfo findByMemberIdOrThrow(Long memberId) {
+        return findByMemberId(memberId).orElseThrow(() -> new CustomException(ErrorMessage.MEMBER_INFO_NOT_FOUND));
+    }
+
+    Optional<MemberInfo> findByMemberId(Long memberId);
+}
diff --git a/src/main/java/org/harang/server/repository/WaitingRepository.java b/src/main/java/org/harang/server/repository/WaitingRepository.java
new file mode 100644
index 0000000..36f55b2
--- /dev/null
+++ b/src/main/java/org/harang/server/repository/WaitingRepository.java
@@ -0,0 +1,12 @@
+package org.harang.server.repository;
+
+import java.util.List;
+import org.harang.server.domain.Member;
+import org.harang.server.domain.Waiting;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface WaitingRepository extends JpaRepository<Waiting, Long> {
+    List<Waiting> findAllByPostId(Long postId);
+}