Method for optimizing terminal interface, and system using the same

A method for optimizing a terminal interface and a system therefor are provided to optimize the interface for each case that a user clicks an icon or a key button by using a stylus pen or by using his/her fingers. A method for optimizing a terminal interface comprises the following steps of: activating a terminal(S1); sensing whether a stylus pen is inserted into the pen hooking part of a terminal main body or not(S2); displaying a user interface, expressed on a terminal screen, in a relatively shrunk shape, if the stylus pen is out of the pen hooking part(S3); and sensing the manipulation of the terminal in accordance with the user interface(S4).