The area control center(ACC) ensures the safety of the aircraft on route. The safety performance assessment can promote the improvement of the system security level. Through the analysis of the operation process of area control center and the influence factors of safety performance, the index system of safety performance assessment is established. The method combining the triangular fuzzy function and the analytic hierarchy process(AHP) is used to evaluate the index. Based on these, the integrated evaluation model of safety performance is established. The data of an area control center is used to verify the case. The result can reasonably reflect the safety management level of the area control center, which shows that the integrated evaluation model of safety performance is reasonable and can properly provide the decision basis for the safety management.