A method of switching a display device according to one embodiment of the present specification can include the steps of displaying an image received from a rear side camera of the display device on a touch sensitive display unit positioned at the front side of the display device, setting an area on which a predetermined gesture is to be recognized based on a touch input and if a gesture substantially identical to the predetermined gesture is recognized on the set area in the image received from the rear side camera, capturing an image using the rear side camera.