A user interface system using a touch screen pad

PURPOSE: A user input device using a touch screen pad is provided to generate a virtual keyboard to make the virtual keypad to function as a keypad, thereby integrating a keyboard with a mouse. CONSTITUTION: A selection key(120) selects touch screen input mode or touch pad input mode. A voice output module(130) outputs a voice signal. A voice input module inputs the voice signal. An image input module inputs the image signal. An image output module outputs the image signal.