diff --git a/types/data.go b/types/data.go
index 1e7c711..0ceccff 100644
--- a/types/data.go
+++ b/types/data.go
@@ -166,6 +166,27 @@ func (data Data) MustGetDataSlice(key string) []Data {
 	return values
 }
 
+// GetFloat64 取得64位元浮點數
+func (data Data) GetFloat64(key string) (float64, error) {
+	value, err := data.Get(key)
+	if err != nil {
+		return 0, err
+	}
+
+	switch value.(type) {
+	case float64:
+		return value.(float64), nil
+	}
+
+	return 0, ErrFormat
+}
+
+// MustGetFloat64 強制取得64位元浮點數
+func (data Data) MustGetFloat64(key string) float64 {
+	value, _ := data.GetFloat64(key)
+	return value
+}
+
 // GetInt64 取得64位元整數
 func (data Data) GetInt64(key string) (int64, error) {
 	value, err := data.Get(key)