diff --git a/src/main/java/com/ai/da/service/impl/LLMServiceImpl.java b/src/main/java/com/ai/da/service/impl/LLMServiceImpl.java
index e4ed1a90..34e632af 100644
--- a/src/main/java/com/ai/da/service/impl/LLMServiceImpl.java
+++ b/src/main/java/com/ai/da/service/impl/LLMServiceImpl.java
@@ -316,11 +316,11 @@ public class LLMServiceImpl implements LLMService {
         qw.lambda().orderByDesc(ChatMessage::getSeq);
         Page<ChatMessage> chatMessagePage = chatMessageMapper.selectPage(new Page<>(chatHistoryDTO.getPage(), chatHistoryDTO.getSize()), qw);
         for (ChatMessage record : chatMessagePage.getRecords()) {
-            if (record.getIsImage() == 1) {
+            if (record.getIsImage() != null && record.getIsImage() == 1) {
                 String content = record.getContent();
                 List<ReceiveCollectionElement> list = JSONObject.parseArray(content, ReceiveCollectionElement.class);
                 for (ReceiveCollectionElement receiveCollectionElement : list) {
-                    if (StringUtils.isEmpty(receiveCollectionElement.getUrl())) {
+                    if (!StringUtils.isEmpty(receiveCollectionElement.getUrl())) {
                         receiveCollectionElement.setMinioUrl(minioUtil.getPreSignedUrl(receiveCollectionElement.getUrl(), 24 * 60));
                     }
                 }