A mobile terminal including a touch screen; a stylus pen including a pressure sensor and an optical sensor; a wireless communication unit configured to wirelessly communicate with the stylus pen; and a controller configured to drive the stylus pen in a first operation mode in which the pressure sensor provided in the stylus pen is activated and the optical sensor is deactivated, when sensing information sensed by the pressure sensor indicates the stylus pen is in contact with the touch screen, and drive the stylus pen in a second operation mode in which both the pressure sensor and the optical sensor provided in the stylus pen are activated, when the sensing information sensed by the pressure sensor indicates the stylus pen is not in contact with the touch screen.