An image forming apparatus administration system, including: an image forming apparatus (11), located in the first local network and connected to the Internet (N) through the first firewall server of the first local network; an administration computer (21), located in the second local network and connected to the Internet through the second firewall server of the second local network; a relaying server (31), located outside the first local network and the second local network, connected to the Internet and including a relaying storage; in which the administration computer at least transmits first passing information for administrating the image forming apparatus by accessing the relaying server or receives second passing information, corresponding a state of the image forming apparatus and stored in the relaying storage of the relaying server; and the image forming apparatus executes an access to the relaying server at a predetermined timing so as to obtain the first passing information, stored in the relaying storage, or to transmit the second passing information.