The present invention relates to a communication apparatus and method for controlling a communicating device by sending predetermined command data without directly operating the communicating device. In step S6, a PDA sends command data described in XML format concerning the start of a Bluetooth function to a personal computer via a reader/writer. In steps S24 and S25, the reader/writer receives the command data sent from the PDA, and requests the personal computer to start the Bluetooth-function. In steps S42 and S43, the personal computer starts the Bluetooth communication function based on the request from the reader/writer. The present invention is applicable to a wireless communication apparatus.