diff --git a/core/logx/config.go b/core/logx/config.go
index ffa4c3f94..8834648b0 100644
--- a/core/logx/config.go
+++ b/core/logx/config.go
@@ -1,68 +1,70 @@
 package logx
 
-// A LogConf is a logging config.
-type LogConf struct {
-	// ServiceName represents the service name.
-	ServiceName string `json:",optional"`
-	// Mode represents the logging mode, default is `console`.
-	// console: log to console.
-	// file: log to file.
-	// volume: used in k8s, prepend the hostname to the log file name.
-	Mode string `json:",default=console,options=[console,file,volume]"`
-	// Encoding represents the encoding type, default is `json`.
-	// json: json encoding.
-	// plain: plain text encoding, typically used in development.
-	Encoding string `json:",default=json,options=[json,plain]"`
-	// TimeFormat represents the time format, default is `2006-01-02T15:04:05.000Z07:00`.
-	TimeFormat string `json:",optional"`
-	// Path represents the log file path, default is `logs`.
-	Path string `json:",default=logs"`
-	// Level represents the log level, default is `info`.
-	Level string `json:",default=info,options=[debug,info,error,severe]"`
-	// MaxContentLength represents the max content bytes, default is no limit.
-	MaxContentLength uint32 `json:",optional"`
-	// Compress represents whether to compress the log file, default is `false`.
-	Compress bool `json:",optional"`
-	// Stat represents whether to log statistics, default is `true`.
-	Stat bool `json:",default=true"`
-	// KeepDays represents how many days the log files will be kept. Default to keep all files.
-	// Only take effect when Mode is `file` or `volume`, both work when Rotation is `daily` or `size`.
-	KeepDays int `json:",optional"`
-	// StackCooldownMillis represents the cooldown time for stack logging, default is 100ms.
-	StackCooldownMillis int `json:",default=100"`
-	// MaxBackups represents how many backup log files will be kept. 0 means all files will be kept forever.
-	// Only take effect when RotationRuleType is `size`.
-	// Even though `MaxBackups` sets 0, log files will still be removed
-	// if the `KeepDays` limitation is reached.
-	MaxBackups int `json:",default=0"`
-	// MaxSize represents how much space the writing log file takes up. 0 means no limit. The unit is `MB`.
-	// Only take effect when RotationRuleType is `size`
-	MaxSize int `json:",default=0"`
-	// Rotation represents the type of log rotation rule. Default is `daily`.
-	// daily: daily rotation.
-	// size: size limited rotation.
-	Rotation string `json:",default=daily,options=[daily,size]"`
-	// FileTimeFormat represents the time format for file name, default is `2006-01-02T15:04:05.000Z07:00`.
-	FileTimeFormat string `json:",optional"`
-	// LogKey represents the log key.
-	LogKey logKeyConf `json:",optional"`
-}
+type (
+	// A LogConf is a logging config.
+	LogConf struct {
+		// ServiceName represents the service name.
+		ServiceName string `json:",optional"`
+		// Mode represents the logging mode, default is `console`.
+		// console: log to console.
+		// file: log to file.
+		// volume: used in k8s, prepend the hostname to the log file name.
+		Mode string `json:",default=console,options=[console,file,volume]"`
+		// Encoding represents the encoding type, default is `json`.
+		// json: json encoding.
+		// plain: plain text encoding, typically used in development.
+		Encoding string `json:",default=json,options=[json,plain]"`
+		// TimeFormat represents the time format, default is `2006-01-02T15:04:05.000Z07:00`.
+		TimeFormat string `json:",optional"`
+		// Path represents the log file path, default is `logs`.
+		Path string `json:",default=logs"`
+		// Level represents the log level, default is `info`.
+		Level string `json:",default=info,options=[debug,info,error,severe]"`
+		// MaxContentLength represents the max content bytes, default is no limit.
+		MaxContentLength uint32 `json:",optional"`
+		// Compress represents whether to compress the log file, default is `false`.
+		Compress bool `json:",optional"`
+		// Stat represents whether to log statistics, default is `true`.
+		Stat bool `json:",default=true"`
+		// KeepDays represents how many days the log files will be kept. Default to keep all files.
+		// Only take effect when Mode is `file` or `volume`, both work when Rotation is `daily` or `size`.
+		KeepDays int `json:",optional"`
+		// StackCooldownMillis represents the cooldown time for stack logging, default is 100ms.
+		StackCooldownMillis int `json:",default=100"`
+		// MaxBackups represents how many backup log files will be kept. 0 means all files will be kept forever.
+		// Only take effect when RotationRuleType is `size`.
+		// Even though `MaxBackups` sets 0, log files will still be removed
+		// if the `KeepDays` limitation is reached.
+		MaxBackups int `json:",default=0"`
+		// MaxSize represents how much space the writing log file takes up. 0 means no limit. The unit is `MB`.
+		// Only take effect when RotationRuleType is `size`
+		MaxSize int `json:",default=0"`
+		// Rotation represents the type of log rotation rule. Default is `daily`.
+		// daily: daily rotation.
+		// size: size limited rotation.
+		Rotation string `json:",default=daily,options=[daily,size]"`
+		// FileTimeFormat represents the time format for file name, default is `2006-01-02T15:04:05.000Z07:00`.
+		FileTimeFormat string `json:",optional"`
+		// FieldKeys represents the field keys.
+		FieldKeys fieldKeyConf `json:",optional"`
+	}
 
-type logKeyConf struct {
-	// CallerKey represents the caller key.
-	CallerKey string `json:",default=caller"`
-	// ContentKey represents the content key.
-	ContentKey string `json:",default=content"`
-	// DurationKey represents the duration key.
-	DurationKey string `json:",default=duration"`
-	// LevelKey represents the level key.
-	LevelKey string `json:",default=level"`
-	// SpanKey represents the span key.
-	SpanKey string `json:",default=span"`
-	// TimestampKey represents the timestamp key.
-	TimestampKey string `json:",default=@timestamp"`
-	// TraceKey represents the trace key.
-	TraceKey string `json:",default=trace"`
-	// TruncatedKey represents the truncated key.
-	TruncatedKey string `json:",default=truncated"`
-}
+	fieldKeyConf struct {
+		// CallerKey represents the caller key.
+		CallerKey string `json:",default=caller"`
+		// ContentKey represents the content key.
+		ContentKey string `json:",default=content"`
+		// DurationKey represents the duration key.
+		DurationKey string `json:",default=duration"`
+		// LevelKey represents the level key.
+		LevelKey string `json:",default=level"`
+		// SpanKey represents the span key.
+		SpanKey string `json:",default=span"`
+		// TimestampKey represents the timestamp key.
+		TimestampKey string `json:",default=@timestamp"`
+		// TraceKey represents the trace key.
+		TraceKey string `json:",default=trace"`
+		// TruncatedKey represents the truncated key.
+		TruncatedKey string `json:",default=truncated"`
+	}
+)
diff --git a/core/logx/logs.go b/core/logx/logs.go
index f3c872d1d..843e363e5 100644
--- a/core/logx/logs.go
+++ b/core/logx/logs.go
@@ -276,8 +276,8 @@ func SetUp(c LogConf) (err error) {
 	// Because multiple services in one process might call SetUp respectively.
 	// Need to wait for the first caller to complete the execution.
 	setupOnce.Do(func() {
-		setupLogLevel(c)
-		setupLogKey(c.LogKey)
+		setupLogLevel(c.Level)
+		setupFieldKeys(c.FieldKeys)
 
 		if !c.Stat {
 			DisableStat()
@@ -481,8 +481,35 @@ func handleOptions(opts []LogOption) {
 	}
 }
 
-func setupLogLevel(c LogConf) {
-	switch c.Level {
+func setupFieldKeys(c fieldKeyConf) {
+	if len(c.CallerKey) > 0 {
+		callerKey = c.CallerKey
+	}
+	if len(c.ContentKey) > 0 {
+		contentKey = c.ContentKey
+	}
+	if len(c.DurationKey) > 0 {
+		durationKey = c.DurationKey
+	}
+	if len(c.LevelKey) > 0 {
+		levelKey = c.LevelKey
+	}
+	if len(c.SpanKey) > 0 {
+		spanKey = c.SpanKey
+	}
+	if len(c.TimestampKey) > 0 {
+		timestampKey = c.TimestampKey
+	}
+	if len(c.TraceKey) > 0 {
+		traceKey = c.TraceKey
+	}
+	if len(c.TruncatedKey) > 0 {
+		truncatedKey = c.TruncatedKey
+	}
+}
+
+func setupLogLevel(level string) {
+	switch level {
 	case levelDebug:
 		SetLevel(DebugLevel)
 	case levelInfo:
@@ -580,30 +607,3 @@ func writeStack(msg string) {
 func writeStat(msg string) {
 	getWriter().Stat(msg, mergeGlobalFields(addCaller())...)
 }
-
-func setupLogKey(c logKeyConf) {
-	if c.CallerKey != "" {
-		callerKey = c.CallerKey
-	}
-	if c.ContentKey != "" {
-		contentKey = c.ContentKey
-	}
-	if c.DurationKey != "" {
-		durationKey = c.DurationKey
-	}
-	if c.LevelKey != "" {
-		levelKey = c.LevelKey
-	}
-	if c.SpanKey != "" {
-		spanKey = c.SpanKey
-	}
-	if c.TimestampKey != "" {
-		timestampKey = c.TimestampKey
-	}
-	if c.TraceKey != "" {
-		traceKey = c.TraceKey
-	}
-	if c.TruncatedKey != "" {
-		truncatedKey = c.TruncatedKey
-	}
-}
diff --git a/core/logx/logs_test.go b/core/logx/logs_test.go
index 59eb114f6..0c3638940 100644
--- a/core/logx/logs_test.go
+++ b/core/logx/logs_test.go
@@ -779,15 +779,9 @@ func TestSetup(t *testing.T) {
 		MaxBackups:  3,
 		MaxSize:     1024 * 1024,
 	}))
-	setupLogLevel(LogConf{
-		Level: levelInfo,
-	})
-	setupLogLevel(LogConf{
-		Level: levelError,
-	})
-	setupLogLevel(LogConf{
-		Level: levelSevere,
-	})
+	setupLogLevel(levelInfo)
+	setupLogLevel(levelError)
+	setupLogLevel(levelSevere)
 	_, err := createOutput("")
 	assert.NotNil(t, err)
 	Disable()
@@ -1167,7 +1161,7 @@ func TestLogKey(t *testing.T) {
 		Mode:        "console",
 		Encoding:    "json",
 		TimeFormat:  timeFormat,
-		LogKey: logKeyConf{
+		FieldKeys: fieldKeyConf{
 			CallerKey:    "_caller",
 			ContentKey:   "_content",
 			DurationKey:  "_duration",
@@ -1180,7 +1174,7 @@ func TestLogKey(t *testing.T) {
 	})
 
 	t.Cleanup(func() {
-		setupLogKey(logKeyConf{
+		setupFieldKeys(fieldKeyConf{
 			CallerKey:    defaultCallerKey,
 			ContentKey:   defaultContentKey,
 			DurationKey:  defaultDurationKey,
diff --git a/core/logx/vars.go b/core/logx/vars.go
index 62dc96177..9079120a7 100644
--- a/core/logx/vars.go
+++ b/core/logx/vars.go
@@ -63,17 +63,6 @@ const (
 	defaultTruncatedKey = "truncated"
 )
 
-var (
-	callerKey    = defaultCallerKey
-	contentKey   = defaultContentKey
-	durationKey  = defaultDurationKey
-	levelKey     = defaultLevelKey
-	spanKey      = defaultSpanKey
-	timestampKey = defaultTimestampKey
-	traceKey     = defaultTraceKey
-	truncatedKey = defaultTruncatedKey
-)
-
 var (
 	// ErrLogPathNotSet is an error that indicates the log path is not set.
 	ErrLogPathNotSet = errors.New("log path must be set")
@@ -84,3 +73,14 @@ var (
 
 	truncatedField = Field(truncatedKey, true)
 )
+
+var (
+	callerKey    = defaultCallerKey
+	contentKey   = defaultContentKey
+	durationKey  = defaultDurationKey
+	levelKey     = defaultLevelKey
+	spanKey      = defaultSpanKey
+	timestampKey = defaultTimestampKey
+	traceKey     = defaultTraceKey
+	truncatedKey = defaultTruncatedKey
+)
diff --git a/core/logx/writer.go b/core/logx/writer.go
index c71408746..7a359c63b 100644
--- a/core/logx/writer.go
+++ b/core/logx/writer.go
@@ -212,7 +212,6 @@ func newFileWriter(c LogConf) (Writer, error) {
 	statFile := path.Join(c.Path, statFilename)
 
 	handleOptions(opts)
-	setupLogLevel(c)
 
 	if infoLog, err = createOutput(accessFile); err != nil {
 		return nil, err