A watch phone comprising: a display device including a touch screen panel adapted to function as an input device and a display adapted to display user data; a single mode selection key configured to select one of a watch mode and an idle mode; and a controller configured to: upon receipt of an incoming call, while displaying time on the display in the watch mode in which the touch screen panel is turned off, control the display to display at least two first areas for call connection and at least two second areas for call rejection on the display, the second areas being different from the first areas, and control to turn on the touch screen panel in order to receive touch input on the at least two first areas or the at least two second areas displayed on the display; when switching from the watch mode to the idle mode in response to an input signal of the single mode selection key, control to turn on the touch screen panel and control performing a function corresponding to a menu selected by a user manipulation of the touch screen panel, and upon receipt of an incoming call, while displaying the menu on the display in the idle mode, control the display to display the at least two first areas and the at least two second areas. a display device including a touch screen panel adapted to function as an input device and a display adapted to display user data; a single mode selection key configured to select one of a watch mode and an idle mode; and a controller configured to: upon receipt of an incoming call, while displaying time on the display in the watch mode in which the touch screen panel is turned off, control the display to display at least two first areas for call connection and at least two second areas for call rejection on the display, the second areas being different from the first areas, and control to turn on the touch screen panel in order to receive touch input on the at least two first areas or the at least two second areas displayed on the display; when switching from the watch mode to the idle mode in response to an input signal of the single mode selection key, control to turn on the touch screen panel and control performing a function corresponding to a menu selected by a user manipulation of the touch screen panel, and upon receipt of an incoming call, while displaying the menu on the display in the idle mode, control the display to display the at least two first areas and the at least two second areas. upon receipt of an incoming call, while displaying time on the display in the watch mode in which the touch screen panel is turned off, control the display to display at least two first areas for call connection and at least two second areas for call rejection on the display, the second areas being different from the first areas, and control to turn on the touch screen panel in order to receive touch input on the at least two first areas or the at least two second areas displayed on the display; when switching from the watch mode to the idle mode in response to an input signal of the single mode selection key, control to turn on the touch screen panel and control performing a function corresponding to a menu selected by a user manipulation of the touch screen panel, and upon receipt of an incoming call, while displaying the menu on the display in the idle mode, control the display to display the at least two first areas and the at least two second areas.