A method and a system for rendering a widget are provided. The method is used in an electronic device and includes: receiving a display size of a display unit; comparing the display size of the display unit with a lookup table and obtaining the display size of the widget and a user interface; determining whether the display size of the display unit needs to be adjusted to the display size of the widget; re-adjusting the display size of the display to the display size of the widget according to the obtained display size of the widget when determining that the display size of the display unit needs to be adjusted to the display size of the widget; and rendering the widget.