Quality validation methods and validating process of FY 2 geostationary meteorological satellite sea surface temperature (SST) products are introduced. The validation of operational SST product of FY2E and SST retrieval algorithms of FY2F are given out. At present, compared with foreign satellite SST, the accuracy of FY2 SST is poorer because of various reasons, such as the error statistics method, the retrieval algorithm and the system design, etc. In situ SST validation and cross product SST validation have their own advantages. In situ SST validation can give an objective evaluation of FY2 SST product. Analysis SST field has the advantages of global coverage, good timeliness and a more uniform quality. The cross product SST validation by analysis SST field for FY2 SST can meet the need of timeliness, which can also provide relative quality information. The geostationary satellite SST product validation information can provide a reference for product development and related users.