PURPOSE:To observe a video image and to listen to voice preferred by each communication conference equipment by utilizing a packet exchange network as a communication network, allowing each communication conference equipment to send a video packet and a voice packet to all participant equipments or only a required communication conference equipment and synthesizing the video image and adding voice in its own equipment. CONSTITUTION:Communication conference equipments (terminal equipments) 32 - 36 set a logical path with all terminal equipments of n-poit in participating to a conference, process a video signal and a voice signal into packets and send then to all terminal equipments of the n-point. For example, the terminal equipment 32 at a point A makes 4 copies from one video packet and sends them to a point B through a route Ab and terminal equipments 34, 35, 36 at points C, D, E through routes Ac, Ad, Ae respectively simultaneously. The video packet and the voice packet from the received 4 points are converted into a video signal and a voice signal at the point E, and as to the video signal, e.g., 3 points A, B, C are selected and the signal is displayed on a display device of its own terminal equipment with synthesis. As to the voice, the voice signals from all points are added and outputted. Moreover, this is similar in the point B.