Recently, there has been an increase in human casualties and property damage caused by large-scale disasters such as massive wildfires, concentrated heavy rainfall, chemical accidents, and infectious diseases. To enhance the citizen protection capabilities of civil defense personnel, it is necessary to ensure their capacity to perform on-site citizen protection duties and guarantee their safety. Particularly, the current civil defense uniforms are vulnerable to fire and waterproofing, and the safety is threatened when civil defense personnel perform field activities such as fire and flood damage. Therefore, there is an urgent need for research and development of civil defense uniforms to ensure functionality and safety. In this study, we aim to understand the duties of domestic civil defense units and the characteristics of on-site situations, analyze overseas civil defense uniform replication cases, and derive safety criteria for civil defense uniforms. Developing civil defense uniforms based on safety and functional criteria is expected to enhance civil defense personnel's capabilities and increase public welfare by deriving optimal performance for each mission.