PROBLEM TO BE SOLVED: To provide a technique for assisting a mountaineer who is distressed while walking by his/her companion and mobilizing the companion to the site while ensuring the safety of the companion. A companion terminal 90 used by each companion for climbers, a management server 50 communicable with the companion terminal, and environment servers 400 and 500 for transmitting environment information of a geographical area designated by the companion terminal. In the system including, when the management server determines that the climber may be a victim, it receives companion information from each companion terminal and, based on the information, identifies each companion for each companion. Calculate the personal risk when dispatched to the location of the victim, receive environmental information from the environment server, and calculate the environmental risk when dispatching one of the companions to the location of the victim based on that information However, if one of the accompanying persons is allowed to be dispatched to the location of the victim, the rescuer selected from the plurality of accompanying persons is requested to rescue the victim. [Selection diagram] Fig. 12
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