针对日前消费者所关注的轿车选型问题,设计包括动力性、经济性、安全可靠性、占用空间及环保性和美观舒适性五个方面的轿车车型评价体系及评价方法,应用信息熵方法确立各指标的权重值,并应用该模型对5款家用经济型轿车进行评价.评价结论为消费者进行轿车选型提供了理论及实际依据. Aiming at the problem of sedan selection concerned by consumers, the evaluation system and evaluation method of sedan models including power, economy, safety and reliability, occupancy space, environmental protection and aesthetic comfort are designed. Information entropy method is used to establish The weight value of each index, and apply the model to evaluate 5 domestic economical cars.The conclusion of the evaluation provides the theoretical and practical basis for the consumers to carry out the car selection.