diff --git a/monitor.mjs b/monitor.mjs
index 0746c00..4a2f200 100644
--- a/monitor.mjs
+++ b/monitor.mjs
@@ -28,7 +28,7 @@ class Monitor {
         const _self = this;
 
         if ( !this.config || (typeof(forceReload) != 'undefined' && forceReload) ) {
-	        console.log("Load config from %s", this.configFile);
+            console.log("Load config from %s", this.configFile);
             let config = await common.getConfigFromJsonFile(this.configFile);
 
             //覆盖默认配置
@@ -76,7 +76,7 @@ class Monitor {
             let taskRes;
             let total = configs.monit_urls.length;
             for (let i=0; i<total; i++) {
-            	if (_self.tasks.find((item) => item.url == configs.monit_urls[i] && item.stats != 'done')) {continue;}
+                if (_self.tasks.find((item) => item.url == configs.monit_urls[i] && item.stats != 'done')) {continue;}
 
                 console.log("Checking url %s ...", configs.monit_urls[i]);
                 taskRes = await common.createHeroUnionTask(configs.monit_urls[i], '', configs);
@@ -95,33 +95,53 @@ class Monitor {
     }
 
     async queryTasks() {
-    	const _self = this;
+        const _self = this;
         let configs = await _self.getConfig();
 
-    	let task, taskRes;
+        let task, taskRes;
         for(let index = 0; index < _self.tasks.length; index ++) {
-        	task = _self.tasks[index];
-        	if (task.status == 'done') {continue;}
+            task = _self.tasks[index];
+            if (task.status == 'done') {continue;}
 
             //console.log('Query task result of %s', task.id);
             taskRes = await common.queryHeroUnionTask(task.id, configs);
-        	if (taskRes && taskRes.code == 1) {
-                _self.tasks[index] = taskRes.task;
-
-                common.log('Connect success, url: %s, task id: %s', task.url, task.id);
-
-                let currentTime = common.getLocalTimeString();
-                let logFile = path.resolve(_self.systemLogDir) + '/ok.log';
-                common.saveLog(logFile, `[${currentTime}] Url request success: ${task.url}, task id: ${task.id}\n`);
+            if (taskRes && taskRes.code == 1) {
+                _self.tasks[index] = taskRes.task;        //更新任务数据
+
+                common.log('Task status: %s, url: %s, task id: %s', task.status, task.url, task.id);
+
+                if (task.status == 'done') {
+                    let currentTime = common.getLocalTimeString();
+                    let logFile = path.resolve(_self.systemLogDir) + '/ok.log';
+                    common.saveLog(logFile, `[${currentTime}] Url request success: ${task.url}, task id: ${task.id}\n`);
+
+                    //写入JSON格式的log
+                    logFile = path.resolve(_self.systemLogDir) + '/json_stats.log';
+                    let logData = {
+                        "time": currentTime,
+                        "url": task.url,
+                        "status": task.status
+                    };
+                    common.saveLog(logFile, JSON.stringify(logData) + `\n`);
+                }
             }else {
                 console.error("Monit task query failed", taskRes);
 
-                //TODO: 写入日志，或发送告警
                 common.error('Connect warning, url: %s, task id: %s', task.url, task.id);
 
+                //写入日志
                 let currentTime = common.getLocalTimeString();
                 let logFile = path.resolve(_self.systemLogDir) + '/fail.log';
                 common.saveLog(logFile, `[${currentTime}] Url request failed: ${task.url}, task id: ${task.id}\n`);
+
+                //写入JSON格式的log
+                logFile = path.resolve(_self.systemLogDir) + '/json_stats.log';
+                let logData = {
+                    "time": currentTime,
+                    "url": task.url,
+                    "status": task.status
+                };
+                common.saveLog(logFile, JSON.stringify(logData) + `\n`);
             }
         }