A display device is disclosed. The display device includes a sensor unit configured to sense an input to the display device, a display unit configured to display an image, a communication unit configured to perform communication with an external device, and a processor configured to control the sensor unit, the display unit and the communication unit, wherein the processor detects a touch input of a first input state to the display unit, the first input state being a touch input state detected with the external device worn on a user's body, detects content displayed by the external device worn on the user's body, the content being displayed at a plurality of executing levels, detects that the displayed content is first content displayed at a first executing level, receives, from the external device, second content using the communication unit, the second content being displayed at a lower executing level of the first executing level, and displays the received second content on the display unit.