Based on the sea surface temperature (SST) from Hadley Center, the precipitation data of GPCP, NCEP-DOE reanalysis data, the variability of boreal spring south tropical Atlantic (STA) SST anomaly (SSTA) and its association with boreal summer precipitation in the Asian-Australian monsoon region are investigated by using statistical analysis methods.The results indicate a significant negative (positive) relationship between boreal spring STA SSTA and subsequent summer precipitation anomalies in the tropical western Pacific-South China Sea (the sea between eastern Australia and the tropical eastern Indian Ocean).The spring positive STA SSTA can cause an anomalous vertical circulation over the equatorial Atlantic and tropical Pacific.The anomalous descending and low-level divergence over the tropical central Pacific can generate anomalous easterly conditions in the tropical western Pacific, which can result in a negative SSTA in the tropical central eastern Pacific.In the tropical central and eastern Pacific, the SSTA can be enhanced by the Bjerknes positive feedback mechanism from boreal spring to summer.During boreal summer, two anomalous anticyclones are induced over the western Pacific as a result of the Rossby wave response to the negative SSTA in the tropical central eastern Pacific.The tropical western Pacific and South China Sea (seas to eastern Australia and tropical eastern Indian Ocean) are experiencing anomalous easterly winds in 850 hPa, resulting in less (more) precipitation for tropical west Pacific and South China Sea.