Keyboard having touch screen mounted thereon, control method therefor, and method for controlling computing device using keyboard

The present invention provides a keyboard having a touch screen mounted thereon. A keyboard according to the present invention comprises: a key button unit including a plurality of key buttons; a touch screen unit including at least one touch screen installed on the lower end of the key button unit; a sensing means for sensing use of the key button unit; and a keyboard control unit for transmitting an input signal through the key button unit and the touch screen unit to a computing device, and interworking with the sensing means to control an input or output of the touch screen unit, wherein the keyboard control unit controls a screen displayed on the touch screen unit to be displayed on a display of the computing device when the use of the key button unit is sensed by the sensing means. According to the present invention, a touch screen mounted on a keyboard is utilized as an auxiliary input device and an auxiliary display of a computer. Therefore, the present invention can provide a more convenient I/O interface to a user, thereby enabling the user to utilize a multi-tasking function of the computer more easily and variously.