In order to solve the problem of the nonuniform light,reduce the infl uence from environmental light and decrease data error from the artificiality,a color measurement system is proposed and made under stable and uniform light.This system consists of th e standard light box,the luminance colorimeter (Spectrum Scan PR-670) and the color measurement software.The stan dard light box is developed more than its original version so that more uniform light can be generated and supported by changing the shape of it,setting the diffusion plate and light guide plate,adj usting the light position and so on. Utilizing luminance colorimeter PR-670,high accuracy parameters about color ar e tested,such as chroma, tristimulus value,spectrum,color coordinates,luminance and so on,and color c oordinates have high precise of 10－4.By combining with color meas urement software,all sorts of parameters are collected and analyzed from different aspects.And the software can support writing and reading data ab out color,and data and pictures about the color can be saved.The nature of color is got by using this system fin ally.The experimental results demonstrate that when the color is tested in the original standard ligh t box,the color coordinates of it are very different with changing its places,and Sx=3.40046×10 －5,Sy=4.73875×10－5;when the color i s tested in the developed standard light box that,to some extent the color coordin ates are dense,and Sx₁=8.18249×10－6, Sy₁=1.59099×10－5.This kind of color sys tem can improve the light uniformity,get high accuracy parameters,reduce error ,and realize the automation control.