Abstract: The invention provides a method of multiplexing moving pictures fed from a plurality of multimedia communication terminals through broadband Integrated Service Distance Network (B-ISDN) and displaying a multiplexed moving picture on a display unit of the plurality of terminals, which comprising the steps of checking a type and a performance of the terminals, and assistance possible performance of the MCU to the terminals by end-and-end signaling; and selecting M terminals among the plurality of terminals connected thereto; generating a start signal to the selected M terminals, the start signal allowing each of the selected terminals to generate the moving picture to be processed; processing a first and second moving pictures generated from two terminals in response to the start signal; processing a third and four moving pictures generated from two terminals in response to the start signal; repeating said steps until all of moving pictures from the selected M terminals are inputted.