Users may be aware reliably contention reservation status, providing the reservation management system can be avoided in advance the contention state for the user. Reservation management system is a system in which the reservation management devices 2 and 3 a plurality of managing the reservation information for reserving the operation of equipment 4, 5, 4,5 a device, There is connected via the network 1, detecting means for detecting that the reservation management system 2 and 3 the two are connected via a network 1 with one another, the competition in the reservation information to and from the registered respective reservation management devices 2 and 3 in the detection of at least If the judgment means for judging whether or not, that the conflict occurs in the reservation information between any two is detected, I comprises a notifying means for notifying the user of the fact.
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