Multimedia conference realizing method and multimedia conference system

The invention discloses a multimedia conference realizing method comprising the steps of: when a user terminal makes a statement, sending multimedia data to a service node (SN) to which the user terminal per se belongs; after the SN receives the multimedia data, forwarding the multimedia data to other subordinated user terminals of the SN, and/or other SNs in a multimedia conference system; and after other SNs receive the multimedia data, forwarding the multimedia data to the subordinated user terminals of the corresponding SN per se. The invention also discloses a multimedia conference system. By adopting the method and the system provided by the invention, the bandwidth utilization rate, the expansibility and the service quality of the multimedia conference system can be improved and the use cost can be reduced.