Abstract: Disclosed is a method for collection and correction of a display unit. The method includes: placing a camera in front of a display unit to be corrected; collecting RGB brightness data of the display unit to be corrected to obtain an original brightness matrix; placing a standard brightness plane in front of a lens of the camera; obtaining a final brightness correction matrix of the camera according to the collected RGB brightness data of the standard brightness plane; multiplying the original brightness matrix by the final brightness correction matrix to obtain a restored real brightness matrix; and performing brightness correction on the real brightness matrix to obtain a corrected brightness matrix. A plurality of the display units corrected by the present disclosure are completely the same in terms of absolute brightness value, and positions of the display units can be arbitrarily changed with each other on the screen.