Abstract: By analyzing the VMware vSpher products and related virtualization technologies, proposed a private cloud data center infrastructure design.From the ESX host、dynamic resource allocation management on Vcenter server、virtual machine migration technology by VMware Vmotion and VMware Data Recovery snapshot technology four parts, the feasibility of which are tested and proved.Finally, we use TCO calculator to calculate the cost of private cloud, the data show that which is less than traditional data center if deploy a large number of high-performance servers by virtualization.