diff --git a/src/main/java/com/inspect/simulator/service/impl/HikVisionServiceImpl.java b/src/main/java/com/inspect/simulator/service/impl/HikVisionServiceImpl.java
index ec9b8a4..cfdea38 100644
--- a/src/main/java/com/inspect/simulator/service/impl/HikVisionServiceImpl.java
+++ b/src/main/java/com/inspect/simulator/service/impl/HikVisionServiceImpl.java
@@ -1262,27 +1262,79 @@ public class HikVisionServiceImpl implements HikVisionService {
 
     //ftp图片获取
     public InputStream downloadFtp(String downloadPath) {
+        FTPSClient ftps = null;
         InputStream inputStream = null;
-        FTPSClient ftps;
+
         try {
             ftps = new FTPSClient(true);
             ftps.connect(ftpUrlAddress, ftpUrlPort);
             boolean loginRes = ftps.login(ftpUrlAccount, ftpUrlPwd);
-            System.out.println(loginRes);
-            ftps.setFileType(2);
+            log.info("FTP登录结果: {}", loginRes);
+
+            if (!loginRes) {
+                log.error("FTP登录失败");
+                return null;
+            }
+
+            ftps.setFileType(2); // 二进制模式
             ftps.enterLocalPassiveMode();
             ftps.setControlEncoding("UTF-8");
             ftps.setFileTransferMode(10);
             ftps.execPROT("P");
+
+            // 获取文件流
             inputStream = ftps.retrieveFileStream(downloadPath);
             if (inputStream == null) {
-                System.out.println("[FTP] DOWNLOAD FAIL, EMPTY STREAM:" + downloadPath);
+                log.warn("[FTP] DOWNLOAD FAIL, EMPTY STREAM: {}", downloadPath);
+                return null;
+            }
+
+            // 将数据读取到内存中
+            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
+            int nRead;
+            byte[] data = new byte[8192];
 
+            while ((nRead = inputStream.read(data, 0, data.length)) != -1) {
+                buffer.write(data, 0, nRead);
             }
+
+            // 完成文件传输操作
+            boolean completed = ftps.completePendingCommand();
+            if (!completed) {
+                log.warn("FTP文件传输未正确完成: {}", downloadPath);
+            }
+
+            // 关闭原始流（重要：必须在completePendingCommand之后关闭）
+            inputStream.close();
+            inputStream = null; // 防止finally再次关闭
+
+            // 创建新的InputStream返回
+            byte[] fileData = buffer.toByteArray();
+            log.info("成功下载文件: {}, 大小: {} 字节", downloadPath, fileData.length);
+            return new ByteArrayInputStream(fileData);
+
         } catch (Exception e) {
-            log.error("error" + e);
+            log.error("FTP下载错误: " + e.getMessage(), e);
+            return null;
+        } finally {
+            // 关闭原始输入流
+            if (inputStream != null) {
+                try {
+                    inputStream.close();
+                } catch (IOException ignored) {}
+            }
+
+            // 关闭FTP连接
+            if (ftps != null && ftps.isConnected()) {
+                try {
+                    ftps.logout();
+                    ftps.disconnect();
+                    log.info("FTP连接已关闭");
+                } catch (IOException e) {
+                    log.error("FTP断开连接错误: " + e.getMessage(), e);
+                }
+            }
         }
-        return inputStream;
     }
 
 
@@ -1471,6 +1523,9 @@ public class HikVisionServiceImpl implements HikVisionService {
         } else if (AlgConstants.INFRA_CAMERA_REVERSE.equals(imageType)) {
             //相机反算红外
             InputStream inputStreamPath = downloadFtp(imagePath);
+            if(StringUtils.isNull(inputStreamPath)){
+                log.error("inputStreamPath图片为空");
+            }
 
             //调取实时测温温度
             //传值，相机 ip