Abstract: A new method of commercial facilities location modeling based on multi-agent system(MAS) is proposed.The model has 3 kinds of agents,i.e.,customer agents,seller agents and government agents.The macro commercial facilities spatial distribution can be get from micro spatial interactions between agents and environment by the model running.The model can simulate the location choice with the diverse site selection strategies and provide the support to the decision.The location process in different site selection strategies in a virtual city is simulated.