An embodiment of the invention discloses a brightness adjusting method. The method is applied to a terminal configured with a touch display screen. The method includes obtaining a click operation input by a user for the touch display screen in a preset brightness adjustment mode, determining a contact area of the click operation on the touch display screen, and increasing or decreasing the brightness of a predetermined unit of the contact area. Correspondingly, the embodiment of the invention also discloses a brightness adjusting device and a terminal. With the brightness adjusting method, theadjusting device, the terminal and a medium product, it is possible to adjust the brightness of the area where color difference exists in the display screen and improve the display balance.