A Bluetooth communication method and system for enabling one Bluetooth device to rapidly connect to another Bluetooth device using an audio signal, and also enabling them to transmit data to each other are provided. The system includes first and second Bluetooth devices. The first Bluetooth device transforms authentication information required to establish a Bluetooth communication connection into an audio signal, and broadcasts the audio signal. The second Bluetooth device receives the audio signal and extracts the authentication information from the received audio signal. The second Bluetooth device establishes a Bluetooth communication channel with the first Bluetooth device, using the extracted authentication information.