A backlight module includes a light guide plate; a first light source arranged along a first side of the light guide plate; a plurality of second light sources arranged along at least one of the two sides perpendicular to the first side, wherein the plurality of second light sources have different color temperatures, and values of the color temperatures of the second light sources at different positions are determined according to the light absorption characteristics of the light guide plate so as to compensate for the light absorbed by the light guide plate corresponding to the color temperature of the second light source.