In this paper, the multi-channel spectral reconstruction system was built by using the digital camera with filter, which could help the digital camera to get the CCD response value that could be conversed into spectral reflectance. As result, the relative color information of the Chinese painting could be acquired and the process of spectral reconstruction could be accomplished. About research process, firstly, the Chinese painting color cards were made by using the Mali Chinese painting pigment coated on xuan paper, and part of these card were chose as the training samples, and the other part was as for experimental samples. Secondly, the color information of Chinese painting card could be gotten by using the EOS 5D canon digital camera to take photos with these cards. At the same time the spectral reflectance of these card could be tested by spectrophotometer. Finally, the relative spectral reconstruction algorithm was used to reconstruct spectral reflectance for experimental samples. The result showed that based on Pseudo-inverse method to reconstruct spectral reflectance of Chinese painting card could have higher accuracy and the color information of the Chinese painting could be accurately reproduced.