The embodiment of the invention discloses a regulation method and device capable of aiming at the display screen of an intelligent terminal, and the intelligent terminal. The target area of the intelligent terminal is provided with a polaroid of which the polarization efficiency is adjustable, and the target area is an appointed area which is likely to age on the display screen. The method comprises the following steps: when the display screen is under a luminance detection state, detecting the first luminance information of the target area of the display screen and the second luminance information of an adjacent area; and according to the first luminance information and the second luminance information, regulating the polarization efficiency of the polaroid, and causing the luminance of the target area and the luminance of the adjacent area to meet a luminance balance condition. The image of the display screen can not be guaranteed to avoid a severe image degradation problem, the luminance of the target area and the luminance of the adjacent area of the target area can be better guaranteed to meet the luminance balance condition, and the situation that parts of area in the display screen brightly shine and other parts darkly shine can be avoided.