The embodiment of the invention discloses a multiplayer network live broadcasting method and device, an adding device and system. The multiplayer network live broadcasting method disclosed by the embodiment of the invention comprises the following steps: setting a first user identifier as a deputy broadcaster identifier of a communication room according to a live broadcasting adding request when receiving the live broadcasting adding request sent by a deputy broadcaster terminal, wherein the live broadcasting adding request carries the first user identifier and a room identifier of the communication room in which the deputy broadcaster terminal needs to add; and then acquiring a first access address corresponding to the first user identifier, sending the first access address to the deputybroadcaster terminal corresponding to the first user identifier, thereby enabling the deputy broadcaster terminal to send video data to an anchor terminal corresponding to an anchor member identifierin the communication room and an audience terminal corresponding to the audience member identifier according to the first access address. Through the scheme disclosed by the embodiment of the invention, the resource consumption of the network live broadcasting system can be reduced.