The invention discloses a live webcasting method and device, relating to the technical field of terminals. The live webcasting method comprises the following steps: selecting at least one user terminal from a plurality of user terminals which are accessing a live streaming server, wherein the plurality of user terminals are in a same local area network; aiming at each of the at least one user terminal, taking the user terminals as live webcasting transit servers, and acquiring addresses of the live webcasting transit servers; and based on the address of the at least one live webcasting transit server, sending live webcasting videos to all user terminals of the plurality of user terminals except the at least one user terminal. According to the live webcasting method and device disclosed by the invention, the plurality of user terminals are taken as the live webcasting transit servers and can be used for replacing the live streaming server to send the live webcasting videos to other user terminals so as to ensure that the pressure of the live streaming server can be reduced by using terminal capabilities of the user terminals, and thus the pressure of the live streaming server can be reduced, the live webcasting fluency can be improved, and the problem that the live webcasting of a live webcasting room is paused can be avoided.