Method and device for controlling karaoke sound equipment through audio playing and system

The invention discloses a method and device for controlling karaoke sound equipment through audio playing and a system, and the method comprises the steps: starting a karaoke room, and activating an original singing mode of a song; playing corresponding accompaniment and displaying corresponding lyrics based on the original singing mode of the song; collecting a singing signal of a user, and matching the singing signal with the accompaniment and the lyrics; if the singing signal is not matched with the accompaniment or the lyrics alternatively, activating the original singing sound of the song; collecting the volume level of the singing signal, and setting the volume level of the original singing sound of the song to be lower than the volume level of the singing signal; allowing the original singing sound of the song to correspond to the singing progress of the user and assisting the user in singing; and dividing a corresponding singing level based on the singing signal, and adjusting the original singing sou