Control method and device of intelligent sound box capable of projecting, and intelligent sound box

The invention belongs to the field of smart home, and provides a control method and device of a projectable smart sound box and the smart sound box, and the control method comprises the steps: receiving a user interaction instruction; the user interaction instruction comprises user voice information and user operation information; obtaining Internet information based on the user interaction instruction; the internet information comprises an audio signal and a multimedia signal; if the Internet information is an audio signal, controlling the audio signal to be sent out through a loudspeaker; if the Internet information is a multimedia signal, an accompanying sound signal is demodulated from the multimedia signal and sent out through a loudspeaker; meanwhile, the image signal is demodulated from the multimedia signal, the image signal is converted into the optical signal, and the optical signal is projected and displayed through the optical machine, so that the large-screen playing requirement of the intelligen