The invention discloses a display screen angular adjustment system, which comprises a plurality of sensors and an adjusting device connected with the plurality of sensors and display screens. The plurality of sensors respectively detect responding light source intensity to a plurality of directions around the display screen and send the light source intensity to the adjusting device. The adjusting device comprises: a calculating module, which is used for adding the light source intensity and calculating mean value of the light source intensity; a comparison module, which is used for comparing whether the light source intensity in a plurality of directions is greater than the mean value and a preset value (If it is, calculates degrees of raising angle in one or some directions.); a control module, which is used for controlling a certain direction of the display screen to raise a corresponding angle. The present invention also provides a method for display screen angular adjustment. The display screen angular adjustment system and method of the invention can automatically adjust oblique visual angle of the display screen.