A method of combining generalized equilibrium feedback assessment developed lately by Liu with Empirical Orthogonal Analysis and Rotated Empirical Orthogonal Analysis is applied to examine the response characteristics of summer precipitation anomaly in six East China climatic regions to sea surface temperature anomaly(SSTA) mode over five basins and to discuss the response mechanism of precipitation anomaly over the Northeast region to SSTA in tropical Pacific. Results show that the response characteristics of anomalous precipitation anomaly over different areas to SSTA are obviously different. In the Northwest region, the precipitation anomaly has a predominant response to the tropical Pacific SSTA, which expresses that when the SSTA pattern is similar to the El Niño mode, the precipitation in summer will increase. In Jianghuai region, the precipitation is robust and is forced by mid-latitude and tropical SSTA, so it has an obvious response to La Niña Modoki mode over the tropical Pacific SSTA and a tripole mode over the North Atlantic SSTA. In addition, the precipitation anomaly over the Southwest region has a close relationship with mid-latitude SSTA. The direct response of geopotential height field in troposphere to similar El Niño mode over the tropic Pacific SSTA is positive anomaly at the tropospheric upper level over the tropic Pacific, and a negative anomaly of upper level geopotential height over the Northeast region occurrs through the East Asia-Pacific (EAP) wave train teleconnection with an anomalous center in the west of the area and a cyclonic circulation anomaly in the low level troposphere. This circulation response is similar to that when the rainfall in Northeast region is above normal.