The invention discloses a method for controlling video playing by utilizing a video conference terminal, a system and equipment thereof. The method comprises the following steps: a protocol conversion gateway receives a signaling which is sent by the video conference terminal and is used for controlling video playing of video source equipment; the protocol conversion gateway transforms the received signaling into a signaling which can be supported by the video source equipment and is used for carrying out corresponding playing control; and the protocol conversion gateway sends the transformedsignaling to the video source equipment. The invention realizes control of video playing by utilizing the terminal in a video conference system.