Abstract: Through the computer models and simulation technology, the imitation of manufacturing and information processes is realized within the VM system. It's already widely used in the dispersed system. On the basis of the concept of process control the DCS and VM, an environment of industrial control computer system including model-creating、control、optimization and simulation was setup. Lots of dynamic mathematic models、static mathematic models and control algorithms were put into the environment, and the simulation system for pulp & paper mill was established. The results obtained both from system simulation and practical computer control were satisfactory.