A display device includes a display unit, at least a flight unit connected to the display unit, a position information receiving unit obtaining information on a current position of the display device, a sensor unit obtaining information of a user, a flight control unit automatically controlling a flight of the display device, a posture information obtaining unit obtaining posture information of the display device, a main control unit controlling an overall operation of respective components of the display device, a posture correction unit varying an angle of the display device or the display unit, a vibration system, a voice recognition unit, a communication module, an input member transmitting input information to the communication module, a power source unit, an obstacle detection unit, a joint manipulator connecting the at least one flight unit and the display unit, and a connector connecting the display unit and the display device.