A charging process management system includes image input/output devices which are connected to a network, each image input/output device having software components that are charged for service fees. A broker is connected to the image input/output devices through the network, the broker providing integrated management and services to the image input/output devices. A service center is connected to the broker through the network, the service center collecting charging information through the broker, the charging information being generated according to respective use conditions of the software components of the image input/output devices. In the management system, when adding a new image input/output device to the management system, either the service center or the new image input/output device transmits a request to the broker, so that software components of the new image input/output device are registered to the broker as charged objects.