diff --git a/src/src/main/java/com/my/graphiteDigesterBg/diframe/api/DiApiDevice.java b/src/src/main/java/com/my/graphiteDigesterBg/diframe/api/DiApiDevice.java
index a6d5e49..c6af027 100644
--- a/src/src/main/java/com/my/graphiteDigesterBg/diframe/api/DiApiDevice.java
+++ b/src/src/main/java/com/my/graphiteDigesterBg/diframe/api/DiApiDevice.java
@@ -26,9 +26,6 @@ public class DiApiDevice extends DiApiControllerBase {
     @Resource
     private DiDevice device;
 
-    @Value("${logging.file.name}")
-    private String logFileName;
-
     /**
      * start device to execute tasks
      */
@@ -158,40 +155,6 @@ public class DiApiDevice extends DiApiControllerBase {
         return this.success(notification);
     }
 
-    @ResponseBody
-    @PostMapping("/api/device/app-log-fetch")
-    public DiApiResponse appLogFetch( @RequestBody Map<String, Object> params ) {
-        Integer offset = (Integer)params.get("offset");
-        Integer limit = (Integer)params.get("limit");
-
-        // open log file and read limit from offset.
-        RandomAccessFile reader = null;
-        try {
-            reader = new RandomAccessFile(this.logFileName, "r");
-            reader.seek(offset);
-            byte[] buffer = new byte[limit];
-            int length = reader.read(buffer);
-            if ( -1 == length ) {
-                return this.success(Map.of("content", "", "length", 0));
-            }
-
-            String content = new String(buffer);
-            return this.success(Map.of("content", content, "length", length));
-        } catch (FileNotFoundException e) {
-            return this.error("日志文件打开失败 : " + e.getMessage());
-        } catch (IOException e) {
-            return this.error("日志文件读取失败 : " + e.getMessage());
-        } finally {
-            if ( null != reader ) {
-                try {
-                    reader.close();
-                } catch (IOException e) {
-                    e.printStackTrace();
-                }
-            }
-        }
-    }
-
     public void pause() {}
     public void resume() {}
 }