A beacon device is a mobile object having an AR marker provided on its surface which indicates an existing position of the beacon device in actual space and transmits a beacon signal including a beacon ID. A user communication device, which is a mobile object equipped with an imaging function, identifies the position of the beacon device by recognizing the AR marker in a live view image, receives the beacon signal transmitted from the beacon device, transmits the beacon ID to a server device and controls to display an object corresponding to the beacon ID transmitted from the server device at the identified position of the beacon device in the live view image. The server device reads out the object corresponding to the beacon ID transmitted from the user communication device from a character data file group and transmits that data to the user communication device.