Abstract: This paper provides the general model for stochastic service systems with many servers, the simulated flowchart and an universal algorithm for computation are given The results of simulating some stochastic service systems have theoretically analysed. That: the results of simulation are quite well coincided with the theoretical analysis for those systems which can be described by analytical formulation; and the numerical solution can be offered by computer simulation for those systems which cannot be easily described by analytical theory. Finally, the application ,of the simulation model for an automatic manufacturing system is introduced.