Anomalous summer air temperature (SAT) series at 160 stations of China during 1960－2010 are adjusted, then an Empirical Orthogonal Function (EOF) analysis is made on original and adjusted anomalous SAT series, respectively. The main results show that: 1) The large value areas of the first three typical fields of the adjusted anomalous SAT series distribute uniformly in three northern regions (namely Northeast China, North China, Northwest China), the Tibetan Plateau, and the Yangtze River, which is consistent with that of the mean square deviation field of SAT, while the large value areas of the first three eigenvectors of the original data lie mainly to the east of 95°E and are apparently different from those of the mean square deviation field. Therefore, the spatial features of EOF analysis on the adjusted data are more reasonable. 2) The EOF first time coefficients of the original data are significantly related to those of the adjusted data, but the variance contributions of the linear and interdecadal components of the first two time coefficients increase significantly. 3) The features of the first two typical fields and their time coefficients for the adjusted data can display the main strong warming and cooling areas in summer over China in the last 51 years, and the interdecadal components are more consistent with the evident interdecadal areas than those of the original data. The above results show that the network homogeneity adjustment improves obviously the results of EOF analysis on anomalous SAT series in China.