diff --git a/format.go b/format.go
index f8c3203..8f787ee 100644
--- a/format.go
+++ b/format.go
@@ -19,7 +19,7 @@ const (
 const DefaultFormat = "2006-01-02 15:04:05 info main.go:88 message"
 
 // DefaultFormatTag 默认日志格式带标签
-const DefaultFormatTag = "2006-01-02 15:04:05 tag info examples/main.go:88 message"
+const DefaultFormatTag = "2006-01-02 15:04:05 tag info main.go:88 message"
 
 // ExtactDateTime 抽取日期和时间格式字符串串
 func ExtactDateTime(format string) (dateFmt, timeFmt string) {
diff --git a/log.go b/log.go
index 30ca51b..25d356c 100644
--- a/log.go
+++ b/log.go
@@ -218,20 +218,38 @@ func JSONIndent(m ...interface{}) {
 	}
 }
 
-func Cost(m string) func() {
-	std.Tprintf(Linfo, "", "%s start...", m)
+func Cost(m ...interface{}) func() {
+	std.Tprintf(Linfo, "", "%v start...", m)
 	start := time.Now()
 	return func() {
-		std.Tprintf(Linfo, "", "%s cost %s", m,
-			time.Now().Sub(start).Truncate(time.Second))
+		std.Tprintf(Linfo, "", "%v cost "+
+			time.Now().Sub(start).Truncate(time.Second).String(), m)
 	}
 }
 
-func Costf(format, m string) func() {
-	std.Tprintf(Linfo, "", format+" start...", m)
+func Costf(format string, m ...interface{}) func() {
+	std.Tprintf(Linfo, "", format+" start...", m...)
 	start := time.Now()
 	return func() {
-		std.Tprintf(Linfo, "", format+" cost %s", m,
-			time.Now().Sub(start).Truncate(time.Second))
+		std.Tprintf(Linfo, "", format+" cost "+
+			time.Now().Sub(start).Truncate(time.Second).String(), m...)
+	}
+}
+
+func Tcost(tag string, m ...interface{}) func() {
+	std.Tprintf(Linfo, tag, "%v start...", m)
+	start := time.Now()
+	return func() {
+		std.Tprintf(Linfo, tag, "%v cost "+
+			time.Now().Sub(start).Truncate(time.Second).String(), m)
+	}
+}
+
+func Tcostf(tag string, format string, m ...interface{}) func() {
+	std.Tprintf(Linfo, tag, format+" start...", m...)
+	start := time.Now()
+	return func() {
+		std.Tprintf(Linfo, tag, format+" cost "+
+			time.Now().Sub(start).Truncate(time.Second).String(), m...)
 	}
 }
diff --git a/log_test.go b/log_test.go
index 68dd6d8..dd5592f 100644
--- a/log_test.go
+++ b/log_test.go
@@ -124,7 +124,30 @@ func TestFormatLogWithTag(t *testing.T) {
 }
 
 func TestCost(t *testing.T) {
-	defer Cost("something")()
+	defer Cost(666, "migo")()
+
+	time.Sleep(time.Second)
+	Info("do do do")
+}
+
+func TestCostf(t *testing.T) {
+	defer Costf("id=%d&name=%s", 666, "migo")()
+
+	time.Sleep(time.Second)
+	Info("do do do")
+}
+
+func TestTcost(t *testing.T) {
+	SetFormat(DefaultFormatTag)
+	defer Tcost("1001", 666, "migo")()
+
+	time.Sleep(time.Second)
+	Info("do do do")
+}
+
+func TestTcostf(t *testing.T) {
+	SetFormat(DefaultFormatTag)
+	defer Tcostf("1001", "id=%d&name=%s", 666, "migo")()
 
 	time.Sleep(time.Second)
 	Info("do do do")