Provided is a method for controlling delivery of a video stream of a live-stream room, and corresponding server and mobile terminal. The method includes steps of: receiving a connection request initiated by an anchor user of the live-stream room from a first terminal and including pre-protocol information outputted by a second terminal; sending, in response to the connection request, a first live video stream uploaded by the first terminal down to the second terminal; and receiving a third live video stream uploaded by the second terminal and formed by combining at least one of a second live video stream and the first live video stream, and delivering the third live video stream to a member user in the live-stream room.