diff --git a/interfaces/kits/js/src/common/ani_helper/type_converter.cpp b/interfaces/kits/js/src/common/ani_helper/type_converter.cpp
index 89a692ca02807fc9735bdb3eb83a8ce5253206d7..801e0c6e6594ae6d38ad593054eb88991b1777ff 100644
--- a/interfaces/kits/js/src/common/ani_helper/type_converter.cpp
+++ b/interfaces/kits/js/src/common/ani_helper/type_converter.cpp
@@ -86,6 +86,26 @@ std::tuple<bool, std::optional<int64_t>> TypeConverter::ToOptionalInt64(ani_env
     return { false, {} };
 }
 
+tuple<bool, optional<double>> TypeConverter::ToOptionalDouble(ani_env *env, const ani_object &value)
+{
+    if (env == nullptr) {
+        return { false, {} };
+    }
+
+    ani_boolean isUndefined;
+    env->Reference_IsUndefined(value, &isUndefined);
+    if (isUndefined) {
+        return { true, nullopt };
+    }
+
+    ani_double doubleValue;
+    if (ANI_OK == env->Object_CallMethodByName_Double(value, "toDouble", nullptr, &doubleValue)) {
+        return { true, make_optional<double>(doubleValue) };
+    }
+
+    return { false, {} };
+}
+
 std::tuple<bool, ani_string> TypeConverter::ToAniString(ani_env *env, std::string str)
 {
     if (env == nullptr) {
diff --git a/interfaces/kits/js/src/common/ani_helper/type_converter.h b/interfaces/kits/js/src/common/ani_helper/type_converter.h
index a0176dc196555be6850ceca270b970c1b6f1bf0b..863640f7af2757ecd29d37a6f382249c7a8358d9 100644
--- a/interfaces/kits/js/src/common/ani_helper/type_converter.h
+++ b/interfaces/kits/js/src/common/ani_helper/type_converter.h
@@ -32,6 +32,7 @@ public:
     static std::tuple<bool, std::string> ToUTF8String(ani_env *env, const ani_string &path);
     static std::tuple<bool, std::optional<int32_t>> ToOptionalInt32(ani_env *env, const ani_object &value);
     static std::tuple<bool, std::optional<int64_t>> ToOptionalInt64(ani_env *env, const ani_object &value);
+    static std::tuple<bool, std::optional<double>> ToOptionalDouble(ani_env *env, const ani_object &value);
     static std::tuple<bool, ani_arraybuffer> ToAniArrayBuffer(ani_env *env, void *buffer, size_t length);
     static std::tuple<bool, ani_string> ToAniString(ani_env *env, std::string str);
     static std::tuple<bool, ani_string> ToAniString(ani_env *env, std::string str, size_t size);