diff --git a/pkg/log/file.go b/pkg/log/file.go
index 3fcc906e9..a99a8515d 100644
--- a/pkg/log/file.go
+++ b/pkg/log/file.go
@@ -57,10 +57,7 @@ func NewFile(dir string, bufferSize, rotateSize int64, maxLogFile int) *FileHand
 
 // Log loggint to file .
 func (h *FileHandler) Log(ctx context.Context, lv Level, args ...D) {
-	d := make(map[string]interface{}, 10+len(args))
-	for _, arg := range args {
-		d[arg.Key] = arg.Value
-	}
+	d := toMap(args...)
 	// add extra fields
 	addExtraField(ctx, d)
 	d[_time] = time.Now().Format(_timeFormat)
diff --git a/pkg/log/pattern.go b/pkg/log/pattern.go
index 14a9853b5..89609d6b6 100644
--- a/pkg/log/pattern.go
+++ b/pkg/log/pattern.go
@@ -80,7 +80,6 @@ func (p *pattern) Render(w io.Writer, d map[string]interface{}) error {
 	for _, f := range p.funcs {
 		buf.WriteString(f(d))
 	}
-
 	_, err := buf.WriteTo(w)
 	return err
 }
diff --git a/pkg/log/stdout.go b/pkg/log/stdout.go
index ef4cb037d..9d7746cd6 100644
--- a/pkg/log/stdout.go
+++ b/pkg/log/stdout.go
@@ -7,34 +7,35 @@ import (
 	"time"
 )
 
-const defaultPattern = "%L %d-%T %f %M"
-
 var _defaultStdout = NewStdout()
 
 // StdoutHandler stdout log handler
 type StdoutHandler struct {
 	out    io.Writer
+	err    io.Writer
 	render Render
 }
 
 // NewStdout create a stdout log handler
 func NewStdout() *StdoutHandler {
 	return &StdoutHandler{
-		out:    os.Stderr,
-		render: newPatternRender(defaultPattern),
+		out:    os.Stdout,
+		err:    os.Stderr,
+		render: newPatternRender("[%D %T] [%s] %M"),
 	}
 }
 
 // Log stdout loging, only for developing env.
 func (h *StdoutHandler) Log(ctx context.Context, lv Level, args ...D) {
-	d := make(map[string]interface{}, 10+len(args))
-	for _, arg := range args {
-		d[arg.Key] = arg.Value
-	}
+	d := toMap(args...)
 	// add extra fields
 	addExtraField(ctx, d)
 	d[_time] = time.Now().Format(_timeFormat)
-	h.render.Render(h.out, d)
+	if lv <= _infoLevel {
+		h.render.Render(h.out, d)
+	} else {
+		h.render.Render(h.err, d)
+	}
 	h.out.Write([]byte("\n"))
 }
 
diff --git a/pkg/log/util.go b/pkg/log/util.go
index da9e26d25..724c5f064 100644
--- a/pkg/log/util.go
+++ b/pkg/log/util.go
@@ -3,10 +3,13 @@ package log
 import (
 	"context"
 	"fmt"
+	"math"
 	"runtime"
 	"strconv"
+	"time"
 
 	"github.com/bilibili/kratos/pkg/conf/env"
+	"github.com/bilibili/kratos/pkg/log/internal/core"
 	"github.com/bilibili/kratos/pkg/net/metadata"
 	"github.com/bilibili/kratos/pkg/net/trace"
 )
@@ -37,6 +40,28 @@ func addExtraField(ctx context.Context, fields map[string]interface{}) {
 	}
 }
 
+// toMap convert D slice to map[string]interface{} for legacy file and stdout.
+func toMap(args ...D) map[string]interface{} {
+	d := make(map[string]interface{}, 10+len(args))
+	for _, arg := range args {
+		switch arg.Type {
+		case core.UintType, core.Uint64Type, core.IntTpye, core.Int64Type:
+			d[arg.Key] = arg.Int64Val
+		case core.StringType:
+			d[arg.Key] = arg.StringVal
+		case core.Float32Type:
+			d[arg.Key] = math.Float32frombits(uint32(arg.Int64Val))
+		case core.Float64Type:
+			d[arg.Key] = math.Float64frombits(uint64(arg.Int64Val))
+		case core.DurationType:
+			d[arg.Key] = time.Duration(arg.Int64Val)
+		default:
+			d[arg.Key] = arg.Value
+		}
+	}
+	return d
+}
+
 // funcName get func name.
 func funcName(skip int) (name string) {
 	if _, file, lineNo, ok := runtime.Caller(skip); ok {