The present application provides a method for adjusting backlight brightness levels of a display. A display region of the display is divided into a plurality of sub-display regions. Each sub-display region displays a sub-image region of a to-be-displayed image. A backlight brightness level of a sub-display region is adjustable. The method including: determining if white-image areas in a sub-image region satisfies a preset condition; and increasing the backlight brightness level of a sub-display region corresponding to the sub-image region if the white-image areas satisfy the preset condition.