The invention relates to a white balance debugging method and device of a displayer and a display method and device of the displayer. The white balance debugging method of the displayer includes the steps that S1, RGB color space data of a test image are converted into Lab color space data; S2, the Lab color space data are corrected according to current correction parameters; S3, the corrected Lab color space data are converted into the RGB color space data, and the test image is displayed on the basis of the converted RGB color space data; S4, color coordinates of the displayed test image are measured, whether the color coordinates need to be corrected or not is judged on the basis of the color coordinates and preset target color coordinates, if the result is negative, the current correction parameters are stored, the procedure is finished, if the result is positive, correction parameters are adjusted, the adjusted correction parameters are used as the current correction parameters, the step 2 is repeated and correction continues to be carried out until the judgment result is positive. The white balance debugging method of the displayer can improve white balance consistency of the displayer without the need of changes of materials.