Abstract: Taking ’ER Lotus No. 5’ lotus root as test materials, with the lotus root soaked in water as the control group（CK）, the lotus root immersed in a mixture solution containing 0.02% citric acid, 0.05% EDTA-Na2, 0.02%D-ascorbic acid, 0.01% sodiumde hydroacetate, 0.02% sodiumsulfite as EX group, the changes of chromaticity value of lotus root in EX and CK groups under cold storage conditions were analyzed by data statistics methods.The feasibility of determining whether lotus root browning and bleaching occurred by the appearance analysis was explored. The results showed that with the extension of storage time, the chromaticity value range of lotus root in control group changed significantly after browning, the minimum values of L*and b*and the maximum value of a*of lotus root increased, while the chromaticity change trend of lotus root in EX group was obviously different from that of CK group. According to statistical analysis, within the best shelf life, the normal chromaticity range of nonbrowninglotus root was L*: 17.85～29.67, a*: 0.62～2.82, b*: 5.53～11.76. In addition, the frequency of chromaticity value of lotus root also changed significantly after browning. It could be determined whether the lotus root browning occurred through the range of lotus root chromaticity value combined with its frequency equation. The results of the blenching verification experiment showed t hat the chromaticity value range and frequency equation of lotus root after bleaching was not compliant with the normal lotus root chromaticity range and frequency equation. Which suggested that the lotus root chromaticity value could be used to determine whether lotus root browning and bleaching occurred.