DEVICE INTERCONNECTION METHODS AND SYSTEM, VEHICULAR DEVICE, AND TERMINAL DEVICE

A device interconnection method includes: in response to an operation of starting up a screen mirroring application program, starting up the screen mirroring application program, where the screen mirroring application program includes a screen mirroring identifier used in this screen mirroring; generating an audio file carrying the screen mirroring identifier; and playing the audio file at least once to generate an acoustic wave signal, such that a screen mirroring application program in a terminal device collects the acoustic wave signal, and establishes a screen mirroring link with the vehicular device based on the screen mirroring identifier in the acoustic wave signal.