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Elevator traffic systems are the main vertical transportation facilities in high-rise buildings which play a vital role in modern life. A well-designed elevator traffic system should provide passengers with both sufficient quantity and satisfactory quality of service. Considering that the classical elevator traffic planning theory focuses, mainly, on the quantity of service, ignoring the quality of service, a simulation based verification method for elevator traffic planning is proposed, in which the object oriented discrete event driven technique, based on an improved multi-server batch service queuing discipline, is employed to describe the dynamic behaviors of both passengers and elevators to evaluate the service level of elevator traffic system. The initial configuring results by the classical calculation model are adjusted on simulation to meet both the expected passenger handling capacities and the expected service level. The proposed method perfects the classical elevator traffic planning theory which shows better results than the classical methods.