A system for adjusting a view angle of a display can automatically adjust a view angle of the display to prevent lights from reflecting on the display. A plurality of sensors detect light intensities of a plurality of directions around the display, and send the detected light intensities to an adjusting device. The adjustment device calculates the light intensities to get a sum and an average of the light intensities, and controls the view angle of the display to be turned a corresponding degree in response to light intensities of some directions being greater than the average and a preset value.