Based on the NCEP/NCAR reanalyzed monthly wind and pressure dataset,the Local Pattern Analogue Coefficient(LPAC) map of May-September inter-monthly field between 1958—1997 is calculated.The long term averaged LPAC map fairly reflects the processes of the establishment of India summer monsoon circulation pattern,the northward movement of east Asia summer monsoon circulation,and the south Asia high moving up the Tibet Plateau in the troposphere and lower stratosphere,and the LPAC in those areas is significantly lower than that in non-monsoon area of the same latitude.In the middle stratosphere,the establishment of summer pattern circulation shows a character of longitudinal symmetry of LPAC and the propagation of the low value area of LAPC from high to low latitude.Moreover the spatial-temporal cross-section of East Asian LPAC climatic variability and three flood years LPAC anomaly maps are analyzed,and the result indicates that those maps objectively reflect the anomaly of the seasonal transition of circulation pattern and it’s relationship with the anomaly of East Asian monthly precipitation.