Abstract: Because of the requirement for high resolution initial field of mesoscale or small scale numeric weather prediction model,we designed the cloud analysis scheme based on single satellite image pixel. Some evidences show that the results of analysis are proved to be effective and proper. In our paper,we mainly introduced the methods of using both visible and infrared channels in computing pixel of partially filled FOV,and using bright temperature difference between infrared and vapor channel to separate pixels in an area into several groups,as well as using data of infrared and vapor channels to calculate cloud height and cloud classification.