Abstract: Based on the correlative analysis between SCS(South China Sea) summer monsoon intensity index and sea temperature anomalous field in 0-400 m deep in tropical Pacific and India Oceans, the strongest signal of SCS summer monsoon is embodied in the level of 120 m, which has related with EN SO peried. Monsoon intensity and sea temperature are classified based on the information of correlation field. Composite analysis is done about 120 m temperature anomalous field and 850 hPa U component. It is found that tropical sea temperature anomaly affects SCS summer monsoon intensity, whereas monsoon intensity changes the distribution of sea temperature. At the end of the paper, sea temperature field and wind field are given which has the indicative meaning to monsoon and ENSO prediction.