To provide a remote centralized management system capable of performing processing efficiently (reduction of manual man-hour by automation) and economically (use of a plurality of infrastructures).

The remote centralized management system 9 informs a customer, a service stronghold 10 or the like of a sensed result by facsimile or a mail. This information is request from the customer or the service stronghold 10 to which the customer belongs. The service stronghold 10 grasps the state of OA equipment 2 owned by the customer, and when the customer is informed of the sensed result, a serviceman of the service stronghold 10 visits the customer if necessary.