To efficiently realize support for handling disasters that were difficult to handle under conventional systems. A disaster handling support system (10), wherein the disaster handling support system (10) is configured to include a knowledge management device (142) provided with: a communication device (208) for communicating with another device; a storage device (206) for storing knowledge (152) pertaining to the handling of respective disasters; and a calculation device (202) for executing a process in which characteristic information indicating that it is not possible to identify content about how to handle a disaster is received from an information processing device (118) provided with a disaster handling organization, the information processing device (118) selecting existing disaster handling content from characteristic information for a disaster that is occurring, the degree of similarity between the received characteristic information and disasters associated with the respective pieces of knowledge (152) in the storage device (205) is identified using a prescribed algorithm, information about a disaster having a degree of similarity at or above a prescribed level and a piece of knowledge for handling this disaster are read out from the storage device (206), and the read-out disaster information and knowledge are returned to the information processing device (118) as information for recommending how to handle the disaster that has occurred.
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