An image display system including a display control device and terminals is provided. Each of the terminals includes a processor configured to: extract, from a photograph photographed for a specific period, an image representing a code for identifying a material stored in a server; and obtain the code by decoding the image, and a receiver configured to obtain a material from the server based on the code obtained. The display control device includes a controller configured to control the display to display the image. In a first terminal of the terminals, the specific period is a first period. In a second terminal of the terminals, the specific period is a second period. The controller controls the display to display a particular image as the image for the first period. The particular image represents, as the code, a code for identifying a particular material.