E-government is a new kind of government mode under the environment of informatization,while the cloud computing is a standardized service process. At present, the development of E-government in China has entered a new stage, which witnessed that cloud computing has been used to improve resources integration, business collaboration and integrated application. On the basis of concluding the current development of E-government in our country, the paper focuses on the analysis of development advantages for E-government under cloud computing environment and puts forward suggestions and countermeasures to promote E-government cloud deployment.