In a fire, a smoke mask is the most immediate life-saving tool. According to behavioral observations, people often have the following problems: placing purchased smoke masks in storage rooms, cabinets, etc., resulting in a waste of prime time in searching for life-saving masks when a fire occurs. In addition, in the mask's design, we re-examined what assistance the victims and rescuers at the fire scene needed during the golden time, and by understanding the needs of both parties, the mask was redefined and designed.