Abstract: The scenario of each disposal stage determines the work of the emergency management and the point of decision-making in the emergencies disposal process. It affects the overall decision making of all the emergency management work. In this paper, to solve the problem of emergency scenario selection, it uses the method of semantic similarity model and the semantic close range and the cloud matching model to determine the scenario convergence domain. Thus, it can be relatively accurately determine the scene in the emergency response process, thus providing support for the decision system.