diff --git a/index.js b/index.js
index ee4c115..6faff96 100644
--- a/index.js
+++ b/index.js
@@ -37,12 +37,11 @@ var filekv = function(config){
 
 
 };
+
 filekv.create = function(config){
 	return new filekv(config);
 };
 
-
-
 filekv.prototype.setFileDir = function(path){
 	var self = this;
 	if(!path){
@@ -93,10 +92,10 @@ filekv.prototype.has = function(key,opt,cb){
 		fs.exists(filePath,function(exists){
 
 	        if(exists){
-	        	queueCB.call(self,null,filePath);
+	        	queueCB(null,filePath);
 	            cb(null,filePath);
 	        }else{
-	        	queueCB.call(self,null,exists);
+	        	queueCB(null,exists);
 	            cb(null,exists)
 	        }
 	    });
@@ -120,41 +119,47 @@ filekv.prototype.get = function(key,opt,cb){
 	self._workQueue.queue(function(queueCB){
 
 		readFileLine(filePath,function(lineData,lineNum){
-			if(lineNum==0){
-				expireTime = parseInt(lineData+'')||0;
-				if(expireTime>0 && expireTime<=parseInt(Date.now()/1000)){
-					self.del(key);
-
-					queueCB.call(self,new Error('key expire'));
-
-					cb(new Error('key expire'));
-					return false;
-				}
-			}else if(lineNum==1){
-				createTime = parseInt(lineData+'')||0;
-			}else if(lineNum==2){ //data
-				try{
-					valueData = JSON.parse(lineData+'', function(key, value) {
-	    					return value && value.type === 'Buffer' 
-	    					? new Buffer(value.data)
-	      					: value; // Buffer类型特殊处理
-	  				});
-				}catch(ex){
-					queueCB.call(self,ex);
-
-					cb(ex);
-					return false;
-				}
+			switch(lineNum){
+				case 0:
+
+					expireTime = parseInt(lineData+'')||0;
+					if(expireTime!=0 && expireTime<=parseInt(Date.now()/1000)){
+						self.del(key);
+
+						var cbError = new Error('key expired');
+						queueCB(cbError);
+						cb(cbError);
+
+						return false;
+					}
+					break;
+				case 1:
+					createTime = parseInt(lineData+'')||0;
+					break;
+				case 2: //data
+					try{
+						valueData = JSON.parse(lineData+'', function(key, value) {
+		    					return value && value.type === 'Buffer' 
+		    					? new Buffer(value.data)
+		      					: value; // Buffer类型特殊处理
+		  				});
+					}catch(ex){
+						queueCB(ex);
+						cb(ex);
+						return false;
+					}
+					break;
+				
 			}
 		},function(err,endType,nowLineNum){
 
 			if(err){
-				queueCB.call(self,err);
+				queueCB(err);
 				cb(err);
 			}else{
 				if(endType=='end'){
-					queueCB.call(self,null,valueData);
-					cb(null,valueData);
+					queueCB(null,valueData,createTime,expireTime);
+					cb(null,valueData,createTime,expireTime);
 				}
 			}
 		});
@@ -180,12 +185,16 @@ filekv.prototype.set = function(key,value,expireTime,opt,cb){
 	var filePath = this.fileDir+'/'+_getDataFileSubDir(md5key)+'/';
 
 
-	self.tool.mkdirs(filePath,function(){
+	self.tool.mkdirs(filePath,function(err){//TODO : this callback function's arguments need check error
+		if(!!err){
+			cb(err);
+			return;
+		}
+		var fileAllPath		= filePath+'/'+md5key+'.fkv';
+		var createTime		= parseInt(Date.now()/1000);
+		expireTime			= parseInt(expireTime)||0;
+		if(expireTime!=0)expireTime += createTime;
 
-		var fileAllPath = filePath+'/'+md5key+'.fkv';
-		var valueData = null;
-		var createTime = parseInt(Date.now()/1000);
-		expireTime = parseInt(expireTime)||0;
 		var fileData = '';
 		fileData += expireTime+'\n';
 		fileData += createTime+'\n';
@@ -195,6 +204,10 @@ filekv.prototype.set = function(key,value,expireTime,opt,cb){
 			fs.writeFile(fileAllPath,fileData,function(err){
 				cb.apply(self,arguments);
 				queueCB.apply(self,arguments);
+
+				if(expireTime!=0 && expireTime<=createTime){
+					self.del(key);
+				}
 			});
 
 		});
@@ -203,7 +216,8 @@ filekv.prototype.set = function(key,value,expireTime,opt,cb){
 
 };
 
-filekv.prototype.del = function(key,opt,cb){
+
+filekv.prototype.delete = filekv.prototype.del = function(key,opt,cb){
 	if('function' == typeof opt){
 		cb = opt;
 		opt = {};
@@ -215,5 +229,4 @@ filekv.prototype.del = function(key,opt,cb){
 	fs.unlink(filePath,cb);
 };
 
-
 module.exports = filekv;
diff --git a/package.json b/package.json
index 690d462..1fe7c0b 100644
--- a/package.json
+++ b/package.json
@@ -1,11 +1,16 @@
 {
   "name": "filekv",
-  "version": "1.0.5",
+  "version": "1.0.7",
   "description": "This is a key&value storage library, which uses file system to store data.",
   "main": "index.js",
   "directories": {
     "test": "test"
   },
+  "dependencies": {
+    "readfileline": "^1.0.0",
+    "workqueue": "^1.0.0"
+  },
+  "devDependencies": {},
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },
@@ -19,23 +24,10 @@
     "key",
     "value"
   ],
-  "author": {
-    "name": "zenboss"
-  },
+  "author": "zenboss <zenyes@gmail.com>",
   "license": "MIT",
   "bugs": {
     "url": "https://github.com/zenboss/filekv/issues"
   },
-  "homepage": "https://github.com/zenboss/filekv",
-  "dependencies": {
-    "readfileline": "^1.0.0",
-    "workqueue": "^1.0.0"
-  },
-  "devDependencies": {},
-  "readme": "# filekv\r\n\r\nThis is a key&value storage library, which uses file system to store data.\r\n\r\n\r\n\r\n\r\n\r\n# Install\r\n\r\n>$ npm install filekv -g\r\n\r\n\r\n\r\n# How to use\r\n\r\n``` javascript\r\n\r\nvar filekv = require('filekv');\r\n\r\nvar filekvClient = new filekv({\r\n\r\n        fileDir:__dirname+'/data', //Here is your datafile dir! This config item not have default value!!!\r\n\r\n        workQueueMax:1000 //This number can't greater than your OS open file max number!\r\n\r\n});\r\n\r\n\r\n\r\nfilekvClient.set('userinfo',{name:'wzy',sex:1,github:'http://www.github.com/zenboss'},(Date.now()/1000)+3600,function(err){\r\n\r\n\tconsole.log(err);\r\n\r\n});\r\n\r\nfilekvClient.get('userinfo',function(err,data){\r\n\r\n\tconsole.log(err,data);\r\n\r\n});\r\n\r\nfilekvClient.has('userinfo',function(err,isHas){\r\n\r\n\tconsole.log(err,isHas);\r\n\r\n});\r\n\r\nfilekvClient.del('userinfo',function(err){\r\n\r\n\tconsole.log(err);\r\n\r\n});\r\n\r\n```\r\n\r\n# API\r\n\r\n### filekv.prototype.set(key,value/object[,expireTime[,callback]])\r\n\r\n>Use this function setting a key&value\r\n\r\n### filekv.prototype.get(key[,callback])\r\n\r\n>Use this function get a key&value\r\n\r\n### filekv.prototype.has(key[,callback])\r\n\r\n>Use this function check a key exist\r\n\r\n### filekv.prototype.del(key[,callback])\r\n\r\n>Use this function delete a key",
-  "readmeFilename": "Readme.md",
-  "gitHead": "46dba247523d7c9633822f7e8f4f3021b60e38b3",
-  "_id": "filekv@1.0.5",
-  "_shasum": "2921cfe30703dbabcb4a7765501eeb7004997180",
-  "_from": "filekv@*"
+  "homepage": "https://github.com/zenboss/filekv"
 }
diff --git a/test/test.js b/test/test.js
index 098340f..a9f8178 100644
--- a/test/test.js
+++ b/test/test.js
@@ -4,12 +4,11 @@ var fs = require('fs');
 
 var fkvObj = require('../index.js').create({
 	fileDir:__dirname+'/data',
-	
+
 	workMax:1000
 
 });
 
-
 for(var i =0;i<1000;i++){
 	(function(){
 
@@ -40,7 +39,7 @@ fkvObj.set('test',{name:'zenboss'},function(err1,data1){
 	});
 });
 
-fkvObj.set('test2',{name:'zenboss'},((Date.now()/1000)|0)+1,function(err1,data1){
+fkvObj.set('test2',{name:'zenboss'},3600,function(err1,data1){
 	fkvObj.get('test2',function(err,data){
 		console.log(data,'test2')
 	});
@@ -52,13 +51,13 @@ fkvObj.set('test3','zenboss',function(err1,data1){
 	});
 });
 
-fkvObj.set('test4',{name:'zenboss'},((Date.now()/1000)|0)+1,function(err1,data1){
+fkvObj.set('test4',{name:'zenboss'},1,function(err1,data1){
 	fkvObj.get('test4',function(err,data){
 		console.log(data,'test4')
 	});
 });
 
-fkvObj.set('test5',{name:'zenboss'},((Date.now()/1000)|0)-1,function(err1,data1){
+fkvObj.set('test5',{name:'zenboss'},-1,function(err1,data1){
 	fkvObj.get('test5',function(err,data){
 		console.log(data,'test5: expire test')
 	});