System and method for managing user interface of wired/wireless information terminal and wired/wireless information terminal having a function of managing user interface

A system and method for managing user interface of wired/wireless information terminal and wired/wireless information terminal having a function of managing user interface are provided to improve the UI processing performance by performing parsing and formatting of 'the UI document of markup language in advance. The terminal engine(110) comprises the UI(User Interface) administration unit(210), and the storage(220) and the browser engine(230). The UI administration unit comprises the UI handler(212) and UI update(214). The UI administration unit controls the overall procedure relating to the production of the UI screen. The UI handler performs 'the command relating to the loading and output of UI. The storage comprises the rendering data storage(222) and the user database(224). The storage stores the UI related information. The browser engine comprises the renderer(232), the markup document parser(234), the CSS parser(236), the java script engine(238), data generator(240), the flash engine(242) and transport module(244).