Moreover, the optimal strategies are completely different between the case based on maximizing expected utility criteria and based on minimizing ruin probability criteria. ( III) We study the problem of optimal investment with model risk based on the stochastic differential game approach. 并且,基于最小化破产概率准则与基于最大化终止时刻财富期望效用准则的最优投资策略截然不同。(3)基于随机微分博弈方法,研究了存在模型风险时的最优投资决策问题。