When facing complex and sudden crisis events, personnel in the field of public management face higher levels of requirements. In order to effectively respond to online public opinion, a comprehensive and systematic approach is needed to analyze relevant information. From the perspectives of communication and psychology, this article introduces ensemble learning theory and constructs a systematic evaluation system, evaluation standards, and evaluation methods to solve the problems of model parameter selection and weight calculation in the process of crisis response decision-making strategy selection. By exploring how to establish an efficient and feasible emergency rescue command platform and mechanism for crisis events, it provided a reference basis for the government to formulate corresponding measures. This article tested the mechanism of the model, and the test results showed that the sensitivity of the model to real crisis situations was 0.94 or above; the correct judgment rate for non crisis situations was 96% or above, and it has good classification ability.