The county government plays a fundamental role in the Chinese governance. The e-government system of it can directly reflect the quality and efficiency of its service. Thus, it's significant to evaluate the efficiency of the e-government at county level. Nowadays, there're plenty of methods to do this kind of evaluation. This paper mainly uses principal component analysis to establish the index system, and adopts the CCR and BCC models, two of the data envelopment analysis DEA, to reflect the current input and output efficiency of 147 counties' e-government in Sichuan Province. The analysis reveals that most of the e-governments' comprehensive efficiency, technical efficiency and scale efficiency are nonDEA effective in county level governments of Sichuan Province, and the differences in development among them are quite distinctive. What's more, the local governments' information department should embark on improving their investment scale and technical efficiency in order to enhance the efficiency of e-government.
