To provide a disaster prevention system capable of quickly acquiring and publicizing disaster prevention information or disaster information in a regionally oriented status.

This disaster prevention system is configured to register dangerous places on disaster prevention on a map provided by a server 1 from a portable terminal 4 owned by a person who is responsible for regional disaster prevention by digital pictures and texts day by day, to register priority evacuees such as seniors, to input the disaster information of damage situations and evacuation situations from the portable terminal 4 when any disaster occurs, and to publicize those pieces of information on a map provided on the Web of the server 1.