A communication address setting method for setting, in an operation terminal, communication addresses of a plurality of lighting devices. The communication address setting method includes: displaying a plurality of icons in a set order, on a screen of the operation terminal, the plurality of icons corresponding to a positional relationship of the plurality of lighting devices; and obtaining a communication address from each of the plurality of lighting devices, associating the plurality of icons in the set order with the communication addresses in an order of the obtaining, and displaying a state of the associating on the screen.