An image processing system includes a first processor that is mounted on an image processing apparatus installed in a shared space and shared by plural users who do not belong to an identical organization, and a second processor that is mounted on a control apparatus installed together with a virtual private network (VPN) connection unit in a local area network outside the shared space, the control apparatus being used by an organization to which a part of the plural users belongs, in which the first processor is configured to acquire address information of the VPN connection unit, the first processor is connected to the VPN connection unit by using the acquired address information, and the second processor is configured to acquire apparatus information indicating an apparatus configuration of the image processing apparatus from the image processing apparatus via the VPN connection unit, acquire contract information regarding use of the image processing apparatus corresponding to the organization to which the user who uses the image processing apparatus belongs, and execute processing corresponding to the apparatus information and the contract information to control image processing performed by the first processor.