Recently many companies tend to change the IT infrastructure into the base of Cloud Computing for the efficient utilization and management of resources. Especially the system configuration using Server Virtualization techniques gives us the ease of management, the economy of space, the realization of Green IT as well as the efficiency of resources. The cost of infrastructure construction, however, acts as a burden on cloud computing. Current cloud computing infrastructure for open source server virtualization technology emergence time, support functions, such as utilization based on the third generation to the first generation from classified can. The first-generation server virtualization technology such as Xen, KVM, VirtualBox, and its second-generation server virtualization technology of Oracle VM, VMware vSphere, Citrix XenServer. Finally, the third-generation server virtualization technology as a platform to integrate and manage a variety of hypervisors, OpenStack, Eucalyptus, OpenNebula. This paper analyzes the costless open source server virtualization techniques for the cloud computing infrastructure development and presents it as a basis of the suitable system configuration for the companies.