Abstract: Based on the reanalyzed data of U.S. National Centers for Environmental Prediction and the U.S. National Center for Atmospheric Research (NCEP/NCAR) as well as the daily gridded data of global OLR (Outgoing Longwave Radiation) in 1974-2010 and monthly precipitation measured data in July-August 1980-2010 of four representative stations in Nyingchi, the authors explored four typical rainy years and four typical drier years and combined the situation field of flood and drought years with the spatial and temporal distribution of the OLR field, and analysed the atmospheric circulation corresponding to drought years and flood years and OLR distribution characteristics in Nyingchi. The results show that, there are apparent differences between the OLR and atmospheric circulation in drought and flood years in Nyingchi and the close relationship between the drought and flood situation in Nyingchi and the distribution changes of low latitude OLR. Especially in the Western Pacific subtropical high, the West Pacific ITCZ and the Indian Ocean ITCZ position and intensity and the equatorial Pacific Middle East of OLR surface drought in annual significant differences. Finally, the pre-circulation field characteristics and OLR anomalies were analyzed.