This invention provides a method of implementing a multi-party conference service (MPCS) using broadcast/multicast service of a wireless communications system used for a conference focus, the context of a corresponding broadcast/multicast service session is generated based on the media flow information, multicast service session information and MPCS information. The generated context of the broadcast/multicast service session is then sent respectively to at least one content provider server, at least one mobile terminal and the broadcast/multicast service controller so that the one or more mobile terminals acquires the content media flow through the broadcast/multicast service session.