Virtual laboratory is to rely on computer network environmental experiment environment, its design and application are helpful for creative teaching. The realization of virtual laboratory, what need to most solve is the calculation realizing the high speed of mass data, it has very high requirement for computer performance. Cluster system has good performance but development, along with the increase of CPU number, its performance is nearly linear change. MPI parallel environment is a lowpriced, open, efficient parallel calculate system, in Linux cluster, using MPI parallel environment, can realize well the efficient data handling needed by virtual laboratory. This paper mainly introduces the method of founding MPICH, offeres the detailed disposition of software course, and carries out performance test. This system can calculate used in graph, value calculation and so on.