A consumables management system includes: a service providing device side communication unit that performs communication relevant to consumption information of a consumable item with a mobile device present within a communication area set in advance corresponding to a service providing device; a mobile device side communication unit that is mounted in the mobile device and performs communication relevant to the consumption information with the service providing device side communication unit in a case where the mobile device is present within the communication area; and a notification unit that notifies an administrator possessing the mobile device that a remaining amount of the consumable item mounted in the service providing device has been reduced to a predetermined threshold remaining amount or less in a case where it is determined that the remaining amount of the consumable item has been reduced to the threshold remaining amount or less.