A relationship between cloudtop heights retrieved from combination of FY-2C/D geostationary satellite data and other observation data and radarderived echotops is investigated. Tens of thousands of samples from 20 precipitation cases caused by cumuliformstratiformmixed and stratiform clouds are evaluated. It shows that there is remarkably a positive correlation relationship between satellitederived cloudtopheight and radar echotop. It is likely that the relationship is hardly dependent upon combined reflectivity factor. Cloudtop heights mainly derived by FY-2 are more consistent with echo tops of less than 18 dBz reflectivity factor, compared with those of 18 dBz reflectivity factor because FY2 satellites and SAtyperadars have different observational and retrieval principles. Satellitederived cloudtopheight represents radiation characteristics of cloud droplets in the top of cumuliformstratiformmixed and stratiform clouds, and meanwhile radarretrieved echotop implies ability that larger precipitation particles attenuate electromagnetic waves of radars.