diff --git a/config/config.go b/config/config.go
index 7dfca88a..ef7738d9 100644
--- a/config/config.go
+++ b/config/config.go
@@ -119,6 +119,7 @@ func Getenv(env interface{}) (string, bool) {
 
 	// Onley support string key.
 	if key, ok := env.(string); ok {
+
 		if envKey := strings.TrimPrefix(key, envKeySign); envKey != key {
 			return os.Getenv(envKey), true
 		}
@@ -126,6 +127,36 @@ func Getenv(env interface{}) (string, bool) {
 	return "", false
 }
 
+// ConvertToStringMap convert interface to string config value only for map[string]interface{} config info.
+func ConvertToStringMap(m map[string]interface{}) map[string]string {
+	items := make(map[string]string, len(m))
+	if m == nil || len(m) == 0 {
+		return items
+	}
+
+	var s string
+	for k, v := range m {
+		s = ""
+		if v == nil {
+			s = ""
+		} else if str, ok := v.(string); ok {
+			s = str
+		} else if m, ok := v.(map[string]interface{}); ok {
+			s = fmt.Sprintf("%+v", ConvertToStringMap(m))
+		} else {
+			s = fmt.Sprintf("%+v", v)
+		}
+
+		if len(s) > 0 {
+			if env, ok := Getenv(s); ok {
+				s = env
+			}
+		}
+		items[k] = s
+	}
+	return items
+}
+
 // ParseBool returns the boolean value represented by the string.
 //
 // It accepts 1, 1.0, t, T, TRUE, true, True, YES, yes, Yes,Y, y, ON, on, On,
diff --git a/config/xml/xml.go b/config/xml/xml.go
index d48cfd8e..7222f745 100644
--- a/config/xml/xml.go
+++ b/config/xml/xml.go
@@ -190,28 +190,7 @@ func (c *ConfigContainer) DefaultStrings(key string, defaultval []string) []stri
 // GetSection returns map for the given section
 func (c *ConfigContainer) GetSection(section string) (map[string]string, error) {
 	if v, ok := c.data[section]; ok {
-
-		var interfaceToStr func(map[string]interface{}) map[string]string
-
-		interfaceToStr = func(values map[string]interface{}) map[string]string {
-			strValues := make(map[string]string, len(values))
-			for k, vv := range values {
-				if vv == nil {
-					strValues[k] = ""
-				} else if env, ok := config.Getenv(vv); ok {
-					strValues[k] = env
-				} else if str, ok := vv.(string); ok {
-					strValues[k] = str
-				} else if m, ok := vv.(map[string]interface{}); ok {
-					strValues[k] = fmt.Sprintf("%v", interfaceToStr(m))
-				} else {
-					// TODO: no better.
-					strValues[k] = fmt.Sprintf("%v", vv)
-				}
-			}
-			return strValues
-		}
-		return interfaceToStr(v.(map[string]interface{})), nil
+		return config.ConvertToStringMap(v.(map[string]interface{})), nil
 	}
 	return nil, errors.New("not exist setction")
 }
diff --git a/config/yaml/yaml.go b/config/yaml/yaml.go
index a2ec299c..db849949 100644
--- a/config/yaml/yaml.go
+++ b/config/yaml/yaml.go
@@ -242,29 +242,9 @@ func (c *ConfigContainer) DefaultStrings(key string, defaultval []string) []stri
 
 // GetSection returns map for the given section
 func (c *ConfigContainer) GetSection(section string) (map[string]string, error) {
-	v, ok := c.data[section]
-	if ok {
-		var interfaceToStr func(map[string]interface{}) map[string]string
 
-		interfaceToStr = func(values map[string]interface{}) map[string]string {
-			strValues := make(map[string]string, len(values))
-			for k, vv := range values {
-				if vv == nil {
-					strValues[k] = ""
-				} else if env, ok := config.Getenv(vv); ok {
-					strValues[k] = env
-				} else if str, ok := vv.(string); ok {
-					strValues[k] = str
-				} else if m, ok := vv.(map[string]interface{}); ok {
-					strValues[k] = fmt.Sprintf("%v", interfaceToStr(m))
-				} else {
-					// TODO: no better.
-					strValues[k] = fmt.Sprintf("%v", vv)
-				}
-			}
-			return strValues
-		}
-		return interfaceToStr(v.(map[string]interface{})), nil
+	if v, ok := c.data[section]; ok {
+		return config.ConvertToStringMap(v.(map[string]interface{})), nil
 	}
 	return nil, errors.New("not exist setction")
 }