A method for adjusting a gamma voltage of a curved display panel includes following steps. A first gamma voltage is used as a gamma voltage of a planar display region of a curved display panel in a situation that the planar display region of the curved display panel is horizontally placed and in a white balance state. A curved display region of the curved display panel is divided into a plurality of sub-regions according to a bending degree of the curved display region of the curved display panel. A plurality of inclined angles are determined. A plurality of second gamma voltages are determined in a one-to-one correspondence with the plurality of inclined angles in a situation that the planar display region of the curved display panel is tilted at the plurality of inclined angles and in the white balance state.