A camera monitoring system includes a first camera configured to capture an image of an area including a predetermined area on the left side of a vehicle, a second camera configured to capture an image of an area including a predetermined area on the right side of the vehicle and a third camera configured to capture an image of an area including a predetermined area behind the vehicle. The camera monitoring system further includes a monitor configured to display a composite image including a first captured image captured by the first camera, a second captured image captured by the second camera and a third captured image captured by the third camera and an image processor configured to control a layout of the composite image, and change the layout according to at least either the moving body information or the environmental information.