Our research is based on virtualization technology to implement several practical environments on a single physical hardware with limited resource allocation for many students to have remote access simultaneously. In a single physical hardware, we use Xen Linux as our experimental platform to implement a virtualized laboratory on it. And we apply OpenVZ to Xen server to create more Linux environments; it is like a stand-alone server for each student to use that platform without interruption. Each virtualized server can be used for individual practical needs from management interface, and it can also set up checkpoint to restore to cope with the changes of practical assignments and different class progress. As a result, the virtualized lab has the advantage of flexible adjustment. Each student can have many individual experimental environments. The virtualized laboratory has the ability to centrally manage end-to-end deployments across remote servers and central management on a single server or across multiple virtual servers. It can also solve the current problem of lacking of experimental devices and practical spaces in physical laboratory.