E-government presents a tremendous opportunity to provide higher quality, and cost-effective government services as well as creating a better relationship between citizens and government. The use of Web GIS makes the sharing and applying traditional GIS being possible. Web GIS provides integrated geo-spatial information and services to users and decision support for the government's macro decision-making. However, the current condition of huge initial capital investment in ICT equipment and IT labor does not change. As Cloud Computing enables sharing of resources and costs across a large pool of users while providing on-demand services with dynamic scalability. E-government with cloud computing raises the utilization rate of resource and reduces the budget. In addition, if e-government system is moved to cloud computing environment, cloud computing can construct the system into a service platform which takes service as its core, realizing the transition of government function and promoting the upgrading of local industry and developing low carbon economy. For this reason this research aims to develop a comprehensive framework of support e-government platform, with a specific focus on the e-government system based on Web GIS and private cloud computing based on OpenStack.