In an image display system that is equipped with a camera that images a figure of a visitor of a theme park in front of a mirror device and a background, a server that processes an image of the visitor imaged by the camera and that generates display data, and a display device that displays the display data generated by the server on the mirror device, the server includes a database that stores image data on a character, and generates the display data after replacing part of the image of the visitor imaged by the camera with part of an image of the character selected by the visitor with reference to the database.