MANAGEMENT SYSTEM

The present invention provides a management system for managing the inventory quantity of replaceable items. A server, at specified times before calculated replacement times of all replaceable items,sends replacement information of the situation that the replaceable items, working in user equipment, are closed to the replacement times to the equipment and/or terminals corresponded to the equipment, and/or, generates delivery information of all new replaceable items for replacing the items in the user equipment; according to the generation of the sending and/or delivery of the replacement information, the summation of purchase number of the replaceable items purchased by the users of the equipment at the specified times before the replacement times; according to the summation of the predicted new replaceable items and the inventory quantity of replaceable items in the specified times, the shorage quantity of the replaceable items in the specified times; finally, supplement informationfor supplying the inventor