A command processing method of a wireless terminal configured to communicate with a transportation means and a mobile terminal. The command data processing method includes receiving command data destined for the transportation means from the mobile terminal and checking an operation status of the transportation means. The method also includes determining whether to deliver the command data to the transportation means based on the operation status of the transportation means and information on the command data and delivering, when the command data is determined to be delivered to the transportation means, the command data to the transportation means.