The NOAA daily outgoing longwave radiation (OLR) and the GPCP daily precipitation data are used to study the variation of dominant convection modes and their relationships over Asia, Indian Ocean and western Pacific Ocean during the summers from 1997 to 2004, which includes an extreme flooding (1998) and an very drought (2001) years over the Yangtze River valley.(1) Regression analysis with the OLR indicates the convective variations over Asian monsoon region are more closely associated with the convective activities over the western subtropical Pacific (WSP) than with those over the northern tropical Indian Ocean (NTIO).Although the obvious correlation with the WSP is noted over India in every year, the correlation is not always exhibited over eastern China for the eight years.However, the extreme wet conditions over the Yangtze River valley in 1998 and 1999 and the extreme dry events over the Yangtze River valley and North China in 2001 and 2002 are closely related with the convective activities over the WSP.