diff --git a/backend/src/main/java/com/openisle/repository/LotteryPostRepository.java b/backend/src/main/java/com/openisle/repository/LotteryPostRepository.java
index f06350329..cff12b18f 100644
--- a/backend/src/main/java/com/openisle/repository/LotteryPostRepository.java
+++ b/backend/src/main/java/com/openisle/repository/LotteryPostRepository.java
@@ -3,5 +3,11 @@ package com.openisle.repository;
 import com.openisle.model.LotteryPost;
 import org.springframework.data.jpa.repository.JpaRepository;
 
+import java.time.LocalDateTime;
+import java.util.List;
+
 public interface LotteryPostRepository extends JpaRepository<LotteryPost, Long> {
+    List<LotteryPost> findByEndTimeAfterAndWinnersIsEmpty(LocalDateTime now);
+
+    List<LotteryPost> findByEndTimeBeforeAndWinnersIsEmpty(LocalDateTime now);
 }
diff --git a/backend/src/main/java/com/openisle/service/PostService.java b/backend/src/main/java/com/openisle/service/PostService.java
index b5aa65a80..69d5daf41 100644
--- a/backend/src/main/java/com/openisle/service/PostService.java
+++ b/backend/src/main/java/com/openisle/service/PostService.java
@@ -42,6 +42,8 @@ import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
 import java.util.concurrent.ScheduledFuture;
 
+import jakarta.annotation.PostConstruct;
+
 @Service
 public class PostService {
     private final PostRepository postRepository;
@@ -100,6 +102,20 @@ public class PostService {
         this.publishMode = publishMode;
     }
 
+    @PostConstruct
+    private void rescheduleLotteries() {
+        LocalDateTime now = LocalDateTime.now();
+        for (LotteryPost lp : lotteryPostRepository.findByEndTimeAfterAndWinnersIsEmpty(now)) {
+            ScheduledFuture<?> future = taskScheduler.schedule(
+                    () -> finalizeLottery(lp.getId()),
+                    java.util.Date.from(lp.getEndTime().atZone(ZoneId.systemDefault()).toInstant()));
+            scheduledFinalizations.put(lp.getId(), future);
+        }
+        for (LotteryPost lp : lotteryPostRepository.findByEndTimeBeforeAndWinnersIsEmpty(now)) {
+            finalizeLottery(lp.getId());
+        }
+    }
+
     public PublishMode getPublishMode() {
         return publishMode;
     }