diff --git a/log/filter.go b/log/filter.go
new file mode 100644
index 0000000..e9a8cc6
--- /dev/null
+++ b/log/filter.go
@@ -0,0 +1,80 @@
+package log
+
+type FilterOption func(*Filter)
+
+const fuzzyStr = "***"
+
+func FilterLevel(level Level) FilterOption {
+	return func(opts *Filter) {
+		opts.level = level
+	}
+}
+func FilterKey(key ...string) FilterOption {
+	return func(opts *Filter) {
+		for _, v := range key {
+			opts.key[v] = struct{}{}
+		}
+	}
+}
+func FilterValue(value ...string) FilterOption {
+	return func(opts *Filter) {
+		for _, v := range value {
+			opts.value[v] = struct{}{}
+		}
+	}
+}
+func FilterFunc(f func(level Level, keyvals ...any) bool) FilterOption {
+	return func(opts *Filter) {
+		opts.filter = f
+	}
+}
+
+type Filter struct {
+	logger Logger
+	level  Level
+	key    map[any]struct{}
+	value  map[any]struct{}
+	filter func(level Level, keyvals ...any) bool
+}
+
+func NewFilter(logger Logger, opts ...FilterOption) *Filter {
+	options := &Filter{
+		logger: logger,
+		key:    make(map[any]struct{}),
+		value:  make(map[any]struct{}),
+	}
+	for _, o := range opts {
+		o(options)
+	}
+	return options
+}
+func (f *Filter) Log(level Level, keyvals ...any) error {
+	if level < f.level {
+		return nil
+	}
+	var prefixkv []any
+	l, ok := f.logger.(*logger)
+	if ok && len(l.prefix) > 0 {
+		prefixkv = make([]any, 0, len(l.prefix))
+		prefixkv = append(prefixkv, l.prefix...)
+	}
+	if f.filter != nil && (f.filter(level, prefixkv...) || f.filter(level, keyvals)) {
+		return nil
+	}
+	if len(f.key) > 0 || len(f.value) > 0 {
+		for i := 0; i < len(keyvals); i += 2 {
+			v := i + 1
+			if v >= len(keyvals) {
+				continue
+			}
+			if _, ok := f.key[keyvals[i]]; ok {
+				keyvals[v] = fuzzyStr
+			}
+
+			if _, ok := f.key[keyvals[v]]; ok {
+				keyvals[v] = fuzzyStr
+			}
+		}
+	}
+	return f.logger.Log(level, keyvals...)
+}
diff --git a/log/filter_test.go b/log/filter_test.go
new file mode 100644
index 0000000..596c30c
--- /dev/null
+++ b/log/filter_test.go
@@ -0,0 +1,31 @@
+package log
+
+import (
+	"testing"
+)
+
+func TestNewFilter(t *testing.T) {
+	logger := With(DefaultLogger,
+		//"ts", DefaultTimestamp, "caller", DefaultCaller
+	)
+	log := NewHelper(NewFilter(logger,
+		FilterKey("username"),
+		FilterValue("hello"),
+		FilterFunc(func(level Level, keyvals ...any) bool {
+			if level == LevelWarn {
+				return true
+			}
+			for i := 0; i < len(keyvals); i++ {
+				if keyvals[i] == "password" {
+					keyvals[i+1] = fuzzyStr
+				}
+			}
+			return false
+		}),
+	))
+	log.Log(LevelDebug, "msg", "test debug")
+	log.Info("hello")
+	log.Infow("password", "123456")
+	log.Infow("username", "kratos")
+	log.Warn("warn log")
+}
diff --git a/log/global.go b/log/global.go
new file mode 100644
index 0000000..5975bce
--- /dev/null
+++ b/log/global.go
@@ -0,0 +1,114 @@
+package log
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"sync"
+)
+
+var global = &loggerAppliance{}
+
+type loggerAppliance struct {
+	lock sync.Mutex
+	Logger
+}
+
+func init() {
+	global.SetLogger(DefaultLogger)
+}
+func (l *loggerAppliance) SetLogger(in Logger) {
+	l.lock.Lock()
+	defer l.lock.Unlock()
+	l.Logger = in
+}
+func SetLogger(logger Logger) {
+	global.SetLogger(logger)
+}
+func GetLogger() Logger {
+	return global
+}
+func Log(level Level, keyvals ...any) {
+	_ = global.Log(level, keyvals...)
+}
+func Context(ctx context.Context) *Helper {
+	return NewHelper(WithContext(ctx, global.Logger))
+}
+
+// Debug logs a message at debug level.
+func Debug(a ...interface{}) {
+	_ = global.Log(LevelDebug, DefaultMessageKey, fmt.Sprint(a...))
+}
+
+// Debugf logs a message at debug level.
+func Debugf(format string, a ...interface{}) {
+	_ = global.Log(LevelDebug, DefaultMessageKey, fmt.Sprintf(format, a...))
+}
+
+// Debugw logs a message at debug level.
+func Debugw(keyvals ...interface{}) {
+	_ = global.Log(LevelDebug, keyvals...)
+}
+
+// Info logs a message at info level.
+func Info(a ...interface{}) {
+	_ = global.Log(LevelInfo, DefaultMessageKey, fmt.Sprint(a...))
+}
+
+// Infof logs a message at info level.
+func Infof(format string, a ...interface{}) {
+	_ = global.Log(LevelInfo, DefaultMessageKey, fmt.Sprintf(format, a...))
+}
+
+// Infow logs a message at info level.
+func Infow(keyvals ...interface{}) {
+	_ = global.Log(LevelInfo, keyvals...)
+}
+
+// Warn logs a message at warn level.
+func Warn(a ...interface{}) {
+	_ = global.Log(LevelWarn, DefaultMessageKey, fmt.Sprint(a...))
+}
+
+// Warnf logs a message at warnf level.
+func Warnf(format string, a ...interface{}) {
+	_ = global.Log(LevelWarn, DefaultMessageKey, fmt.Sprintf(format, a...))
+}
+
+// Warnw logs a message at warnf level.
+func Warnw(keyvals ...interface{}) {
+	_ = global.Log(LevelWarn, keyvals...)
+}
+
+// Error logs a message at error level.
+func Error(a ...interface{}) {
+	_ = global.Log(LevelError, DefaultMessageKey, fmt.Sprint(a...))
+}
+
+// Errorf logs a message at error level.
+func Errorf(format string, a ...interface{}) {
+	_ = global.Log(LevelError, DefaultMessageKey, fmt.Sprintf(format, a...))
+}
+
+// Errorw logs a message at error level.
+func Errorw(keyvals ...interface{}) {
+	_ = global.Log(LevelError, keyvals...)
+}
+
+// Fatal logs a message at fatal level.
+func Fatal(a ...interface{}) {
+	_ = global.Log(LevelFatal, DefaultMessageKey, fmt.Sprint(a...))
+	os.Exit(1)
+}
+
+// Fatalf logs a message at fatal level.
+func Fatalf(format string, a ...interface{}) {
+	_ = global.Log(LevelFatal, DefaultMessageKey, fmt.Sprintf(format, a...))
+	os.Exit(1)
+}
+
+// Fatalw logs a message at fatal level.
+func Fatalw(keyvals ...interface{}) {
+	_ = global.Log(LevelFatal, keyvals...)
+	os.Exit(1)
+}
diff --git a/log/global_test.go b/log/global_test.go
new file mode 100644
index 0000000..1c6efb6
--- /dev/null
+++ b/log/global_test.go
@@ -0,0 +1,9 @@
+package log
+
+import (
+	"testing"
+)
+
+func TestDebug(t *testing.T) {
+	Debug("debug")
+}
diff --git a/log/helper.go b/log/helper.go
new file mode 100644
index 0000000..0ef52ec
--- /dev/null
+++ b/log/helper.go
@@ -0,0 +1,121 @@
+package log
+
+import (
+	"context"
+	"fmt"
+	"os"
+)
+
+var DefaultMessageKey = "msg"
+
+type Option func(*Helper)
+type Helper struct {
+	logger Logger
+	msgKey string
+}
+
+func WithMessageKey(k string) Option {
+	return func(opts *Helper) {
+		opts.msgKey = k
+	}
+}
+
+func NewHelper(logger Logger, opts ...Option) *Helper {
+	options := &Helper{
+		msgKey: DefaultMessageKey,
+		logger: logger,
+	}
+	for _, o := range opts {
+		o(options)
+	}
+	return options
+}
+func (h *Helper) WithContext(ctx context.Context) *Helper {
+	return &Helper{
+		logger: WithContext(ctx, h.logger),
+		msgKey: h.msgKey,
+	}
+}
+
+// Log Print log by level and keyvals.
+func (h *Helper) Log(level Level, keyvals ...interface{}) {
+	_ = h.logger.Log(level, keyvals...)
+}
+
+// Debug logs a message at debug level.
+func (h *Helper) Debug(a ...interface{}) {
+	_ = h.logger.Log(LevelDebug, h.msgKey, fmt.Sprint(a...))
+}
+
+// Debugf logs a message at debug level.
+func (h *Helper) Debugf(format string, a ...interface{}) {
+	_ = h.logger.Log(LevelDebug, h.msgKey, fmt.Sprintf(format, a...))
+}
+
+// Debugw logs a message at debug level.
+func (h *Helper) Debugw(keyvals ...interface{}) {
+	_ = h.logger.Log(LevelDebug, keyvals...)
+}
+
+// Info logs a message at info level.
+func (h *Helper) Info(a ...interface{}) {
+	_ = h.logger.Log(LevelInfo, h.msgKey, fmt.Sprint(a...))
+}
+
+// Infof logs a message at info level.
+func (h *Helper) Infof(format string, a ...interface{}) {
+	_ = h.logger.Log(LevelInfo, h.msgKey, fmt.Sprintf(format, a...))
+}
+
+// Infow logs a message at info level.
+func (h *Helper) Infow(keyvals ...interface{}) {
+	_ = h.logger.Log(LevelInfo, keyvals...)
+}
+
+// Warn logs a message at warn level.
+func (h *Helper) Warn(a ...interface{}) {
+	_ = h.logger.Log(LevelWarn, h.msgKey, fmt.Sprint(a...))
+}
+
+// Warnf logs a message at warnf level.
+func (h *Helper) Warnf(format string, a ...interface{}) {
+	_ = h.logger.Log(LevelWarn, h.msgKey, fmt.Sprintf(format, a...))
+}
+
+// Warnw logs a message at warnf level.
+func (h *Helper) Warnw(keyvals ...interface{}) {
+	_ = h.logger.Log(LevelWarn, keyvals...)
+}
+
+// Error logs a message at error level.
+func (h *Helper) Error(a ...interface{}) {
+	_ = h.logger.Log(LevelError, h.msgKey, fmt.Sprint(a...))
+}
+
+// Errorf logs a message at error level.
+func (h *Helper) Errorf(format string, a ...interface{}) {
+	_ = h.logger.Log(LevelError, h.msgKey, fmt.Sprintf(format, a...))
+}
+
+// Errorw logs a message at error level.
+func (h *Helper) Errorw(keyvals ...interface{}) {
+	_ = h.logger.Log(LevelError, keyvals...)
+}
+
+// Fatal logs a message at fatal level.
+func (h *Helper) Fatal(a ...interface{}) {
+	_ = h.logger.Log(LevelFatal, h.msgKey, fmt.Sprint(a...))
+	os.Exit(1)
+}
+
+// Fatalf logs a message at fatal level.
+func (h *Helper) Fatalf(format string, a ...interface{}) {
+	_ = h.logger.Log(LevelFatal, h.msgKey, fmt.Sprintf(format, a...))
+	os.Exit(1)
+}
+
+// Fatalw logs a message at fatal level.
+func (h *Helper) Fatalw(keyvals ...interface{}) {
+	_ = h.logger.Log(LevelFatal, keyvals...)
+	os.Exit(1)
+}
diff --git a/log/helper_test.go b/log/helper_test.go
new file mode 100644
index 0000000..32db525
--- /dev/null
+++ b/log/helper_test.go
@@ -0,0 +1,9 @@
+package log
+
+import "testing"
+
+func TestNewHelper(t *testing.T) {
+	logger := With(DefaultLogger, "ts", DefaultTimestamp, "caller", DefaultCaller)
+	log := NewHelper(logger)
+	log.Debug("debug")
+}
diff --git a/log/level.go b/log/level.go
new file mode 100644
index 0000000..0807fee
--- /dev/null
+++ b/log/level.go
@@ -0,0 +1,49 @@
+package log
+
+import "strings"
+
+type Level int8
+
+const LevelKey = "level"
+const (
+	LevelDebug Level = iota - 1
+	LevelInfo
+	LevelWarn
+	LevelError
+	LevelFatal
+)
+
+func (l Level) Key() string {
+	return LevelKey
+}
+func (l Level) String() string {
+	switch l {
+	case LevelDebug:
+		return "DEBUG"
+	case LevelInfo:
+		return "INFO"
+	case LevelWarn:
+		return "WARN"
+	case LevelError:
+		return "ERROR"
+	case LevelFatal:
+		return "FATAL"
+	default:
+		return ""
+	}
+}
+func ParseLevel(s string) Level {
+	switch strings.ToUpper(s) {
+	case "DEBUG":
+		return LevelDebug
+	case "INFO":
+		return LevelInfo
+	case "WARN":
+		return LevelWarn
+	case "ERROR":
+		return LevelError
+	case "FATAL":
+		return LevelFatal
+	}
+	return LevelInfo
+}
diff --git a/log/log.go b/log/log.go
new file mode 100644
index 0000000..cf3a012
--- /dev/null
+++ b/log/log.go
@@ -0,0 +1,65 @@
+package log
+
+import (
+	"context"
+	"log"
+)
+
+var DefaultLogger = NewStdLogger(log.Writer())
+
+type Logger interface {
+	Log(level Level, keyvals ...any) error
+}
+
+type logger struct {
+	logger    Logger
+	prefix    []any
+	hasValuer bool
+	ctx       context.Context
+}
+
+func (l *logger) Log(level Level, keyvals ...any) error {
+	kvs := make([]any, 0, len(l.prefix)+len(keyvals))
+	kvs = append(kvs, l.prefix...)
+	if l.hasValuer {
+		bindValues(l.ctx, kvs)
+	}
+	kvs = append(kvs, keyvals...)
+	return l.logger.Log(level, kvs...)
+}
+
+func With(l Logger, kv ...any) Logger {
+	c, ok := l.(*logger)
+	if !ok {
+		return &logger{
+			logger:    l,
+			prefix:    kv,
+			hasValuer: containsValuer(kv),
+			ctx:       context.Background(),
+		}
+	}
+	kvs := make([]any, 0, len(c.prefix)+len(kv))
+	kvs = append(kvs, c.prefix...)
+	kvs = append(kvs, kv...)
+	return &logger{
+		logger:    c.logger,
+		prefix:    kvs,
+		hasValuer: containsValuer(kvs),
+		ctx:       c.ctx,
+	}
+}
+func WithContext(ctx context.Context, l Logger) Logger {
+	c, ok := l.(*logger)
+	if !ok {
+		return &logger{
+			logger: l,
+			ctx:    ctx,
+		}
+	}
+	return &logger{
+		logger:    c.logger,
+		prefix:    c.prefix,
+		hasValuer: c.hasValuer,
+		ctx:       ctx,
+	}
+}
diff --git a/log/log_test.go b/log/log_test.go
new file mode 100644
index 0000000..037b494
--- /dev/null
+++ b/log/log_test.go
@@ -0,0 +1,12 @@
+package log
+
+import (
+	"testing"
+)
+
+func Test_logger_Log(t *testing.T) {
+	logger := DefaultLogger
+	logger = With(logger, "ts", DefaultTimestamp)
+	logger = With(logger, "call", DefaultCaller)
+	_ = logger.Log(LevelInfo, "key1", "val1")
+}
diff --git a/log/std.go b/log/std.go
new file mode 100644
index 0000000..9203215
--- /dev/null
+++ b/log/std.go
@@ -0,0 +1,42 @@
+package log
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"log"
+	"sync"
+)
+
+type stdLogger struct {
+	log  *log.Logger
+	pool *sync.Pool
+}
+
+func NewStdLogger(w io.Writer) Logger {
+	return &stdLogger{
+		log: log.New(w, "", 0),
+		pool: &sync.Pool{
+			New: func() any {
+				return new(bytes.Buffer)
+			},
+		},
+	}
+}
+func (l *stdLogger) Log(level Level, keyvals ...any) error {
+	if len(keyvals) == 0 {
+		return nil
+	}
+	if len(keyvals)&1 == 1 {
+		keyvals = append(keyvals, "KEYVALS UNPAIRED")
+	}
+	buf := l.pool.Get().(*bytes.Buffer)
+	buf.WriteString(level.String())
+	for i := 0; i < len(keyvals); i += 2 {
+		_, _ = fmt.Fprintf(buf, " %s=%v", keyvals[i], keyvals[i+1])
+	}
+	_ = l.log.Output(4, buf.String())
+	buf.Reset()
+	l.pool.Put(buf)
+	return nil
+}
diff --git a/log/value.go b/log/value.go
new file mode 100644
index 0000000..77417f5
--- /dev/null
+++ b/log/value.go
@@ -0,0 +1,55 @@
+package log
+
+import (
+	"context"
+	"runtime"
+	"strconv"
+	"strings"
+	"time"
+)
+
+var (
+	DefaultCaller    = Caller(4)
+	DefaultTimestamp = Timestamp(time.RFC3339)
+)
+
+type Valuer func(ctx context.Context) any
+
+func Value(ctx context.Context, v any) any {
+	if v, ok := v.(Valuer); ok {
+		return v(ctx)
+	}
+	return v
+}
+func Caller(depth int) Valuer {
+	return func(ctx context.Context) any {
+		_, file, line, _ := runtime.Caller(depth)
+		idx := strings.LastIndexByte(file, '/')
+		if idx == -1 {
+			return file[idx+1:] + ":" + strconv.Itoa(line)
+		}
+		idx = strings.LastIndexByte(file[:idx], '/')
+		return file[idx+1:] + ":" + strconv.Itoa(line)
+	}
+}
+func Timestamp(layout string) Valuer {
+	return func(ctx context.Context) any {
+		return time.Now().Format(layout)
+	}
+}
+
+func bindValues(ctx context.Context, keyvals []any) {
+	for i := 1; i < len(keyvals); i += 2 {
+		if v, ok := keyvals[i].(Valuer); ok {
+			keyvals[i] = v(ctx)
+		}
+	}
+}
+func containsValuer(keyvals []any) bool {
+	for i := 1; i < len(keyvals); i += 2 {
+		if _, ok := keyvals[i].(Valuer); ok {
+			return true
+		}
+	}
+	return false
+}