A display device for providing a virtual reality service is disclosed. The display device comprises: a display for displaying a stereoscopic image; a user interface for receiving a user command for enlarging or shrinking the stereoscopic image; and a processor adjusting three-dimensional effects for the stereoscopic image such that the stereoscopic image corresponds to the user command when the user command is input, and controlling the display such that the display displays an enlarged image or a shrunken image in which the three-dimensional effect has been adjusted.
