In accordance with respective embodiments of the present invention, flexibility can be improved due to an arbitrary communication system being made available, and convenience can be improved due to visible identification information being made unnecessary. Concretely, an ID-metadata database server is prepared in which metadata in which displaying information and a communication system are described for each peripheral object are stored, and when a display apparatus detects a peripheral object in accordance with receiving a radio signal, the display apparatus acquires metadata of the detected peripheral object from the ID-metadata database server, and executes communication with a peripheral object representative server on the basis of a communication system described in the metadata.