1. A method for detecting uniformity of dark state image of a display, comprising: after an acquired dark state image of a display panel is divided into a plurality of areas according to a preset rule, determining RGB values of each area; calculating corresponding XYZ values of each area in the CIE-XYZ standard respectively based on the RGB values of each area; calculating L* and C* values of each area in the CIE-LCH standard respectively based on the XYZ values of each area; performing statistical analysis to the L* and C* values of the areas in the dark state image so as to determine statistical parameters of the display image; the statistical parameters comprising: a maximum value, a medium value, a normally distributed 3σ value, and a Sobel value of the L* and C* values; determining a dark state uniformity coefficient of the dark state image based on the determined statistical parameters, and determining uniformity of the dark state image of the display panel through the dark state uniformity coefficient; wherein after calculating corresponding XYZ values of each area in the CIE-XYZ standard respectively based on the RGB values of each area, the method further comprises: performing linear transformation of reverse colors to the corresponding XYZ values of each area in the CIE-XYZ standard; and amending the linear transformed values based on empirical values of human eye, and performing an inverse linear transformation to the amended values.