The purpose of this study is to find ways to prepare for the future through past response cases by analyzing the causal loop structure in nursing staffing management according to operational policy of hospital bed for COVID-19. The results are as follows. First, nursing staffing management has a dual goal of meeting both the needs of the general medical system in the hospital and the infection response system. Second, In the response stage, support for the recruitment of new nurses at hospitals themselves as well as dispatched personnel should be provided in parallel. This method not only recruits the necessary staffing in the short term, but also naturally fosters trained staffing to respond to future infectious diseases in the long term. Third, in the preparation stage, the timing of policy intervention is changed to support nursing staffing management during ordinary times of day so that the robustness of hospitals can be increased. The implications of this study were summarized based on the findings.