Image quality compensation method for liquid crystal display device, device and terminal equipment

Disclosed are method and apparatus for compensating for image quality of liquid crystal display device, and a terminal device. The method includes: acquiring RGB value of each pixel in image information output by the liquid crystal display device at a predetermined time interval within preset time period and calculating RGB sum of the RGB values of each pixel, when a duration of display on a screen of the liquid crystal display device is greater than or equal to a preset duration; selecting a RGB sum with the maximum value from the individual RGB sums as a first compensation evaluation value; and compensating for the RGB value of each pixel according to the first compensation evaluation value, each of the RGB sums, an acquired RGB offset compensation value, and the RGB value of each pixel, if the first compensation evaluation value is greater than or equal to a first compensation threshold.