Brightness matching method and brightness matching device of display screen and display device

The invention relates to a brightness matching method and a brightness matching device of a display screen and a display device. The method comprises the following steps: acquiring first brightness of a first gray scale of a first display panel under a first visual angle and second brightness of a second gray scale of the first display panel under the first visual angle; obtaining third brightness of the first display panel under the first visual angle and a third gray scale of the third brightness according to the first brightness and the second brightness, wherein the third brightness is different from fourth brightness of the third gray scale of the first display panel under the second visual angle; and adjusting a third gray scale in the display data of the first display panel to be mixed with the first gray scale and the second gray scale, and driving the first display panel to display based on the mixed first gray scale and second gray scale, so that the brightness of the first display panel at the seco