The infrared imaging simulation credibility evaluation model is proposed based on the decision making thought of analytic hierarchy process. The index system to evaluate the infrared imaging simulation credibility is established. The indexes′ credibility is obtained by applying the statistic analysis or expert′s graded approach. The sum and product method is used to calculate the credibility evaluation factors′ weight. Then the objective quantitative credibility of infrared imaging simulation is gained by considering all credibility evaluation factors comprehensively. The results of research and theory analyzing demonstrate that the proposed method can evaluate the credibility of infrared imaging simulation, and the evaluation result is well consistent with actual infrared image. Theory analysis and the evaluation result of credibility shows the method is reasonable and efficient, and the scientific decision basis is afforded to the simulation users.