A method for at a wireless device establishing a communication connection with an external device is disclosed. The wireless device stores unique information of at least one external device connectable with the wireless device in a connection target list, and receives a connection waiting command from a server connected with the wireless device. In response to the received connection waiting command, the wireless device changes a status thereof to a connection waiting status allowing a connection with the external device, and receives a connection request from the external device finding the wireless device which is in the connection waiting status. If unique information of the connection-requesting external device is contained in the connection target list, the wireless device performs a communication connection with the connection-requesting external device, receives a command data regarding a transportation device from the connected external device, and transmits the received command data to the transportation device.