Abstract: In this paper the model system of the mutual alternating multiple target making decision and fuzzy comprehensive evaluation is advanced in order to analyse mine ventilation system. This model system has the following characteristics. It allows the making decision people to analyse and adjust the models. The solution with which the people express satisfaction can be obtained by multiple information feedback and repeatedly calculation. In this paper the system frame of making decision and evaluation is also put forward. Funther-more, this model system has been applied to the practical research taskes. And the remarkable economic and social benefit is gained.