There is provided a monitoring apparatus which is capable of efficiently notifying an external host of completion of installation of the monitoring apparatus for image forming apparatuses, and completion of operations carried out for the image forming apparatuses. The monitoring apparatus is connected to a management apparatus for communication therewith. The monitoring apparatus acquires maintenance information from the image forming apparatuses, and sends the acquired maintenance information to the management apparatus. The monitoring apparatus carries out one of management of completion of installation of the monitoring apparatus and central management of completion of operations carried out for the image forming apparatuses.