Abstract: A method, a system, and a device for implementing media negotiation are provided. The method includes the following steps. A caller sets media levels, and sends a request carrying the media levels to a callee. After receiving a response carrying media selected by the callee according to the media levels returned from the callee, the caller performs corresponding processing according to the media selected by the callee. Through the method, the caller sets primary and optional media types and specifies the levels of each media type during the media negotiation process. Thus, the additional media information improves the efficiency of the media negotiation of a session.