The invention discloses equipment and method for multimedia conference audio and video transmission. The method includes the steps: when a set period is reached, a conference server determines transmission performances of other conference terminals according to last period audio and video data transmission performance information fed back by other conference terminals except for a current conference terminal which uploads audio and video data; the conference server divides audio and video data received from the current conference terminal which uploads audio and video data into substreams according to the transmission performances of other conference terminals, and distributing the substreams obtained by dividing to other conference terminals according to the transmission performances of other conference terminals; and the conference server sends the audio and video data substeams distributed to other reference terminals to the corresponding conference terminals to enable the corresponding conference terminals to send the received audio and video data substreams to other conference terminals except for the current conference terminal which uploads the audio and video data.