diff --git a/log.go b/log.go
index 3860cae..4f16c84 100644
--- a/log.go
+++ b/log.go
@@ -30,7 +30,9 @@ var (
 const ErrLogPanic = "~~~~panic~~~~~~"
 
 //////////////global log//////////////////begin///////////////////
-
+func SetLogLevel(newlv logLevel) (oldlv logLevel) {
+	return mylogger.SetLogLevel(newlv)
+}
 func PrintPretty(prefix string, v interface{}) {
 	mylogger.PrintPretty(prefix, v)
 }
@@ -46,6 +48,9 @@ func Noticef(format string, v ...interface{}) {
 func NoticefWithDepth(calldepth int, format string, v ...interface{}) {
 	mylogger.NoticefWithDepth(calldepth, format, v...)
 }
+func Infof(format string, v ...interface{}) {
+	mylogger.Infof(format, v...)
+}
 func Warningf(format string, v ...interface{}) {
 	mylogger.Warningf(format, v...)
 }
@@ -60,9 +65,23 @@ func Fatalf(format string, v ...interface{}) {
 }
 
 //////////////////////////////////////////////////////////////////
+
+type logLevel int
+
+const (
+	PANIC   logLevel = 0
+	FATAL   logLevel = 1
+	ERROR   logLevel = 2
+	NOTICE  logLevel = 3
+	WARNING logLevel = 4
+	INFO    logLevel = 5
+	DEBUG   logLevel = 9
+)
+
 type Logger struct {
-	module string
-	logger *log.Logger
+	module   string
+	loglevel logLevel
+	logger   *log.Logger
 }
 
 func New(module string) (logger *Logger) {
@@ -72,52 +91,67 @@ func New(module string) (logger *Logger) {
 	if _, ok := modulelogs[module]; ok {
 		return modulelogs[module]
 	} else {
-		modulelogs[module] = &Logger{module: module, logger: glogger}
+		modulelogs[module] = &Logger{
+			module:   module,
+			logger:   glogger,
+			loglevel: DEBUG,
+		}
 		return modulelogs[module]
 	}
 }
 
+func (log *Logger) SetLogLevel(newlv logLevel) (oldlv logLevel) {
+	oldlv = log.loglevel
+	log.loglevel = newlv
+	return oldlv
+}
+
 func (log *Logger) Print(prefix string, v interface{}) {
 	preety, _ := json.Marshal(v)
-	log.logwrite("DEBUGE", 3, prefix+"%s\n", preety)
+	log.logwrite(DEBUG, 3, prefix+"%s\n", preety)
 }
+
 func (log *Logger) PrintPretty(prefix string, v interface{}) {
 	preety, _ := json.MarshalIndent(v, "==", "    ")
-	log.logwrite("DEBUGE", 3, prefix+"%s\n", preety)
+	log.logwrite(DEBUG, 3, prefix+"%s\n", preety)
 }
 
 func (log *Logger) Debugf(format string, v ...interface{}) {
-	log.logwrite("DEBUGE", 3, format, v...)
+	log.logwrite(DEBUG, 3, format, v...)
 }
 
 func (log *Logger) DebugfWithDepth(calldepth int, format string, v ...interface{}) {
 	calldepth += 3
-	log.logwrite("DEBUGE", calldepth, format, v...)
+	log.logwrite(DEBUG, calldepth, format, v...)
 }
 
 func (log *Logger) Noticef(format string, v ...interface{}) {
-	log.logwrite("NOTICE", 3, format, v...)
+	log.logwrite(NOTICE, 3, format, v...)
 }
 
 func (log *Logger) NoticefWithDepth(calldepth int, format string, v ...interface{}) {
 	calldepth += 3
-	log.logwrite("NOTICE", calldepth, format, v...)
+	log.logwrite(NOTICE, calldepth, format, v...)
 }
 
 func (log *Logger) Warningf(format string, v ...interface{}) {
-	log.logwrite("WARNING", 3, format, v...)
+	log.logwrite(WARNING, 3, format, v...)
+}
+
+func (log *Logger) Infof(format string, v ...interface{}) {
+	log.logwrite(INFO, 3, format, v...)
 }
 
 func (log *Logger) Errorf(format string, v ...interface{}) {
-	log.logwrite("ERROR", 3, format, v...)
+	log.logwrite(ERROR, 3, format, v...)
 }
 
 func (log *Logger) Fatalf(format string, v ...interface{}) {
-	log.logwrite("FATAL", 3, format, v...)
+	log.logwrite(FATAL, 3, format, v...)
 }
 
 func (log *Logger) Panicf(format string, v ...interface{}) {
-	log.logwrite("PANIC", 3, format, v...)
+	log.logwrite(PANIC, 3, format, v...)
 }
 
 func GetLogid() string {
@@ -133,7 +167,11 @@ func SetLogid(logid string) {
 	}
 }
 
-func (log *Logger) logwrite(typ string, calldepth int, format string, v ...interface{}) {
+func (log *Logger) logwrite(typ logLevel, calldepth int, format string, v ...interface{}) {
+	if typ > log.loglevel {
+		return
+	}
+
 	var idstr = ""
 	if id := GetLogid(); id != "" {
 		idstr = "[" + id + "] "
@@ -141,32 +179,34 @@ func (log *Logger) logwrite(typ string, calldepth int, format string, v ...inter
 
 	format = strings.Trim(format, "\n")
 	switch typ {
-	case "PANIC":
+	case PANIC:
 		log.logger.SetPrefix("\x1b[31m" + "PANIC " + idstr + "[" + log.module + "] ")
-	case "FATAL":
-		log.logger.SetPrefix("\x1b[31m" + "FATAL  " + idstr + "[" + log.module + "] ")
-	case "WARNING":
-		log.logger.SetPrefix("\x1b[32m" + "WARNING  " + idstr + "[" + log.module + "] ")
-	case "ERROR":
+	case FATAL:
+		log.logger.SetPrefix("\x1b[31m" + "FATAL " + idstr + "[" + log.module + "] ")
+	case WARNING:
+		log.logger.SetPrefix("\x1b[32m" + "WARNING " + idstr + "[" + log.module + "] ")
+	case ERROR:
 		log.logger.SetPrefix("\x1b[32m" + "ERROR " + idstr + "[" + log.module + "] ")
-	case "NOTICE":
-		log.logger.SetPrefix("NOTICE  " + idstr + "[" + log.module + "] ")
-	case "DEBUGE":
-		log.logger.SetPrefix("DEBUGE  " + idstr + "[" + log.module + "] ")
+	case INFO:
+		log.logger.SetPrefix("INFO " + idstr + "[" + log.module + "] ")
+	case NOTICE:
+		log.logger.SetPrefix("NOTICE " + idstr + "[" + log.module + "] ")
+	case DEBUG:
+		log.logger.SetPrefix("DEBUG " + idstr + "[" + log.module + "] ")
 	default:
-		log.logger.SetPrefix("UNKNOWN  " + idstr + "[" + log.module + "] ")
+		log.logger.SetPrefix("UNKNOWN " + idstr + "[" + log.module + "] ")
 	}
 
 	if mylogger == log {
 		calldepth = calldepth + 1
 	}
 
-	if typ == "FATAL" || typ == "WARNING" || typ == "ERROR" {
+	if typ == FATAL || typ == WARNING || typ == ERROR {
 		log.logger.Output(calldepth, fmt.Sprintf(format+"\x1b[0m\n", v...))
-	} else if typ == "NOTICE" {
+	} else if typ == NOTICE {
 		calldepth = calldepth + 2
 		log.logger.Output(calldepth, fmt.Sprintf(format+"\n", v...))
-	} else if typ == "PANIC" {
+	} else if typ == PANIC {
 		stack := strings.Replace(string(debug.Stack()), "\n", "\n==    ", -1)
 		stack = str.SkipLine(stack, calldepth*2+1)
 		v = append(v, stack)