Abstract:This paper intended to carry out the Pu'erh tea study by chromaticity technology.Relation of the main components tea brown pigment and chromaticity，chromatic value and quality，stability in extraction process of Pu'erh tea was studied.Finally，linear regression equation of chromaticity and tea brown pigment was established.Correlation analysis of each chromatic value and quality，correlation coefficient of multiple regression equation established by the tea chromatic value and taste quality was highest.The study summed up a set of rectification principle by investigating stability in extraction process.