Provided herein may be a display device and a method of controlling a plurality of display devices. The method may include displaying, on a first display device, a first image including a first partial image, a second partial image, and a third partial image, transmitting, by the first display device, a second image including a fourth partial image corresponding to the first partial image, a fifth partial image corresponding to the second partial image, and a sixth partial mage corresponding to the third partial image to a second display device, displaying the second image on the second display device, receiving, by the first display device, a first touch input for a first input interface included in the third partial image, and receiving, by the first display device, a second touch input for at least one of the fourth, fifth partial image, and sixth partial images.