An active earphone authentication method includes a recognition step of recognizing insertion of an earphone by a terminal control unit a voltage supply step of transmitting a voltage supply command to the power supply unit by the terminal control unit if insertion of the earphone is recognized at the recognition step an authentication step of receiving a signal from the earphone and authenticating whether or not the earphone is an active earphone by a reception unit and a circuit implementation step of implementing a circuit of the terminal equipment according to an authentication result of the authentication step.
