1. An image monitoring system comprising: a plurality of cameras connected to a network; a display configured to display images captured by the cameras; and processor circuitry configured to control a display to display at least one of the images in at least one of a first layout and a second layout; wherein, in the first layout, one of the images is allocated to a first position based on first correlation information between the first position in the first layout and an identification information relating camera information, the first correlation information being automatically set without an operation by a user; and wherein, in the second layout, the one of the images is allocated to a second position based on second correlation information between the second position in the second layout and the identification information relating camera information, the second correlation information being set in response to a customization of a position of the one of the images by the user.