Disclosed are shutter glasses capable of automatically changing brightness according to image characteristics and allowing a viewer to adjust brightness and a color temperature according to his preference, a method for adjusting light characteristics of the shutter glasses, and a display system employing the same. The shutter glasses adaptive to be used for a three-dimensional (3D) display device. The shutter glasses include: a pair of shutter liquid crystal panels prepared to correspond to user's left and right eyes; and a controller configured to turn on and off the shutter liquid crystal panels at a certain frequency and control light transmittance of the shutter liquid crystal panels by a gamma voltage corresponding to a certain level control signal.