Abstract: The present invention provides a method for synthesizing a video stream of a live streaming room including the steps of: outputting, in response to an operation instruction of a streamer user for activating multi-source live streaming, pre-protocol information containing feature information of a live streaming room and streamer identity information; configuring a terminal of the streamer user as a server terminal, and receiving a connection request initiated by a second terminal according to the pre-protocol information; receiving, in response to the connection request and after a connection of the streamer user to at least one second terminal is confirmed, a second video stream captured by the second terminal; synthesizing a locally captured first video stream and the second video stream into a third video stream, and uploading the same to a server, so that the server pushes the third video stream to each user in the live streaming room.