With respect to the features of dynamicality and uncertainty of emergency events, a prospect-theory-based method for dynamic adjustment of emergency alternatives is proposed. The problems of emergency event are firstly described, and the problems needed to be solved are presented. And, the method and processes for dynamic adjustment of emergency alternatives are elaborated, according to the idea of value function and weighting function of prospect theory. Finally, a numerical example is provided to illustrate the feasibility and effectiveness of the proposed method.