The general acceptance of the public and the actual use is the necessary prerequisite for the realization of the value of e-government.Using data from the three-city survey undertaken in Chongqing，Wuhan and Tianjin in China，this study builds an integrated model to explore the factors influencing citizens' using behavior of government website.The results show that compatibility，performance expectancy，convenience and trust in government have significant positive effects on the public willingness to use government websites，among which performance expectations plays the strongest positive role in promoting citizens' use intention；effort expectations will inhibit the citizens' use intention；social influence，convenience and use intention have significant positive effect on the citizens' using behavior.