Purpose: In this study, national disasters are defined as the occurrence of cascading disasters taking into account the temporal and seasonal situations, including social crisis conditions such as financial crisis, etc. and large-scale natural and social disasters that occurred in Korea in the past. Method: In order to establish national disaster situations, representative disasters and crisis situations that occurred in Korea were summarized, and national disaster situation scenarios were proposed according to time and situation. The damage caused by the establishment of national disaster situations is expected to be unpredictable. In particular, in the case of an economic crisis such as the IMF, the financial condition of the country is poor, so if cascading disasters occur and the disaster situation lasts for a long time, the government’s ability to support may be remarkably difficult. Results: Preparing for such a national disaster is to be able to effectively cope with similar disasters, and the organization of the National Disaster Countermeasure Headquarters was proposed to respond to national disasters. In order to respond efficiently and promptly to national disaster situations, the President should be the head of the headquarters, the National Assembly and the Ministry of Strategy and Finance should be composed of support groups, and the central government organization of 17 departments, 5 offices, 17 government offices, and the head of 17 municipal governments need to be operated as a working organization of the national disaster countermeasure headquarters. Conclusion: In this study, a situation in which the worst disasters occur continuously and in the long term was established, and the situation of national catastrophe was presented as an example. It is absolutely necessary to prepare for such a worst-case situation, and as climate change, social economy become more complex and diversified, and uncertainty about risks increases, it is believed to be helpful to strengthen national response capabilities.
2. Establishment of National Disasters
3. Establishment and Scenarios of National Disasters and Scenario
4. Response Strategy According to Establishment of National Disasters