Abstract: Since the demand of the embedded Linux GUI system can be customized, an approach to customize and modify UI dynamically with XML is presented based on analyzing most of the embedded GUI productions. This approach provides a function to modify UI for the final user with a customizing modular, by which the data of UI design is separated from application logical modular. The information of the modification stored in the XML document will be used to display the new UI. This approach has been achieved in the embedded Linux system based on MiniGUI.