To simply collect information by using a Bluetooth terminal.

A communication means 11 like a master unit or a slave unit is wirelessly interconnected with a terminal 20 adopting a plurality of the Bluetooth protocols to form a piconet 30 for intercommunication, then a reception means 12 receives data including prescribed information sent at the same time or unidirectionally from interconnected terminals and a storage means 13 stores the received data. A collector uses this system to collect information from users A, B, C or the like. Then the collector reads the stored data and can analyze the data by referencing each opinion. When a terminal 23 of other user D enters the wireless zone 30, since it is possible for the user to automatically take part in the network adopting this system at any time, this system is flexibly operable.