Abstract: Summer temperature anomalies(July to August) at 19 stations in Guangdong Province from 1961 to 2003 are analyzed in terms of the EOF analysis. The 500 hPa height and sea temperature fields are also analyzed and some useful results for the prediction of summer temperature are obtained:The years with anomalously high temperature are 1962,1983,1990,1993,1998,2003, and those with anomalously low temperature are 1973, 1975,1976,1994,1997I;n the years of anomalously high temperature, Subtropical High over the western Pacific would become stronger and stronger from the prophase of summer to summer, the characteristics of the circumfluence of eastern Asia are suitable for the development of Subtropical High over the western Pacific, and In the years of anomalously low temperature, otherwise is true. The El Nino distribution of sea temperature from March to May can be used to predict whether the Subtropical High over the western Pacific is abnormally strong in summer, and the La Nina distribution of sea temperature from December to May can be used to predict whether the Subtropical High over the western Pacific is abnormally weak in summer.