Abstract: Based on the observational radiation data from the NOAA satellite series, the annual cycle of radiation budget and outgoing longwave radiation nearby ten stations represented different climatic region over China has been analysed. It is founded that the annual cycle of these parameters have clearly different features in different climatic regions. Results show that the OLR and net radiation of the earth-atmosphere system can be used in analysing the regional climatology as good parameters except for the meteorological elements observed from the ground.