According tointegration of heterogeneousnetworks, an access network selection policy based on gametheoryisproposed.The model of quality of service of access networks is established. According to non-cooperative competitive and cooperative relations among access networks, and competitive relation between access networks and users, the models of static game of complete information and cooperative game are established. Nash equilibrium is obtained by solving the models and then candidate access networks are decided through quality of service per unit price. Experimental results illustrate that the price of quality of service access networks under static game of complete information is lower than that under cooperative game. Payoff of each access network under static game of complete information is maximized and only realizes local optimization. However, payoff of each access network and the total payoff of all access networks get maximized, and simultaneously reach local and complete optimization under cooperative game. Quality of service per unit price and impact of user satisfaction on the quality of service are compared, and the parameters of game model are discussed, which have effectonqualityofserviceperunitprice.% 针对异构网络融合问题，提出了一种基于博弈论的多接入网络选择策略。首先建立接入网络服务质量模型，然后根据接入网络之间的非合作竞争与合作关系以及接入网络与用户之间的竞争关系，建立了完全信息静态博弈模型和非合作博弈模型，通过求解模型的纳什均衡，依据单位价格服务质量确定候选接入网络。实验结果表明，在完全信息静态博弈模式下各接入网络的服务质量价格低于在合作博弈模式下的价格，各接入网络获得最大收益，仅达到局部最优，而在合作博弈模式下各接入网络的收益和所有网络总收益达到最大化，局部和全局同时达到最优。最后，比较了不同博弈模式下单位价格服务质量，讨论了博弈模型中参数对接入网络单位价格服务质量的影响
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