Using a coupled ocean-atmosphere model simplified, and the low spectrum method and the equilibria theory, we discussed the interaction of South Asian winter and summer monsoons with sea surface tempera- ture(SST) seasonal variation in the neighbor sea area. The results indicate that, when the winter monsoon is strong, the winter SST is low, and the SST will also be low next summer; and vice versa. When the summer monsoon is strong, the summer SST is high; and vice versa. It is inconspicuous for SST in winter that summer monsoon is strong or weak. Ocean-atmosphere interaction reinforces winter and summer monsoons, while meridional SST gradient reinforces winter monsoon and weakens summer monsoon. Using a coupled ocean-atmosphere model simplified, and the low spectrum method and the equilibria theory, we discussed the interaction of South Asian winter and summer monsoons with sea surface temperaure (SST). that when when the winter monsoon is strong, the winter SST is low, and the SST will also be low next summer; and vice versa. When the summer monsoon is strong, the summer SST is high; and vice versa. It is inconspicuous for SST in winter that summer monsoon is strong or weak. Ocean-atmosphere interaction reinforces winter and summer monsoons, while meridional SST gradient reinforces winter monsoon and weakens summer monsoon.