This paper mainly introduces the wood standard of color difference meter, including its subject content, scope of application, reference standard, basic parameters and technical requirements. The wood standard stipulates the parameter size, technical requirements, test methods, inspection rules and other content of color difference meter, which is suitable for the use of various color difference meters. The cited standards include GB 2828, GB 2829, GB3977, GB3978 and other related standards, and specify the lighting and observation conditions of the instrument, color-matching function value, standard illuminating body, etc. In terms of technical requirements, the wood standard specifies the working environmental conditions, color difference Repeatability, Stability, Precision, Repeatability, and inter-stage difference of the instrument in detail to ensure the normal use and accuracy of the instrument.