The data acquisition software of FY3 meteorological satellite is an import part of the FY3 computer and network system, and there are occasionally abnormal data in data acquisition in operation. The abnormal data affect not only the accuracy of level 0 data but the stability of the software in operation. The data acquisition software adopts a simple and practical faulttolerant design on the basis of data recognition, classification, and processing. The implementation of the faulttolerance approach has been realized in the operational systems. The application practice shows that it can effectively detect and discriminate a variety of abnormal data, deal with the classification, and thereby significantly improve the software’s capability of fault tolerance.