The relation between the interannual variation of the east Asian summer monsoon (EASM) and the summer precipitation in China is investigated in terms of the east Asian summer monsoon intensity index. The results suggests that the summer precipitation of China is indigent in the year of stronger EASM, and abundant in the weak year. The relation shows four patterns including strong monsoon with abundant precipitation, weak monsoon with abundant precipitation, strong monsoon with indigent precipitation, weak monsoon with indigent precipitation. The summer monsoon circulation supported only the background for China's rainfall variation, and rainfall and its regional differences are related to the local weather systems at that time.