3D glasses which can individually acquire information according to 3D content that users view. The 3D glasses include a transparent display unit displaying at least one of information on 3D content and a control screen for controlling a 3D display device on a 3D glasses unit, a transmission/reception unit receiving at least one of the information on the 3D content and the control screen for controlling the 3D display device from the 3D display device and transmitting the received signal to the transparent display unit, and a control unit controlling the transparent display unit to display the information on the 3D content or the control screen for controlling the 3D display device.