Based on the daily reanalysis data of European Center for Medium Weather Forecast(ERA-40) and the empirical orthogonal function(EOF) method,we find that the first mode depicts a meridional seesaw variation of the storm track,the second mode depicts the variation of the storm track against its climatological position and the third mode depicts a tri-polar oscillation.Further regression analysis shows that:When eastern storm track moves southward(northward),the sea surface temperature(SST) is of El Nino(La Nina) pattern,winter colder(warmer) sea surface is unusually low(high) upon the east and middle ocean tropic areas and middle-latitude North Pacific and middle troposphere is of positive(negative) Pacific-North American Pattern(PNA) teleconnection;when eastern storm track strengthens(weakens),SST of Kuroshio Current is warmer(colder) than usual,and middle troposphere is of positive(negative) West Pacific Pattern(WP) teleconnection;when eastern storm track presents the positive-negative-positive(negative-positive-negative) tri-polar oscillation from northwest to southeast,SST near Papua New Guinea is warmer(colder) than usual,SST near Hawaii is colder(warmer) than usual,colder(warmer) sea surface is unusually low(high),middle troposphere is positive(negative) similar to PNA Pacific-North American Pattern,teleconnection.All in all,time coefficients of different modes have significant correlation with the Aleutian Low(AL) index,PNA index,WP index,Nino3 index and the Kuroshio Current(KC) index respectively,which demonstrates the existence of the relationship between the east storm track and atmosphere as well as SST anomaly.