The invention discloses a sharing method and a system of video device, wherein the method comprises the steps as follows: inquiring the current state of the video device; selecting the video device in available mode; connecting the route of the video device and the target device by controlling the video and audio matrix between the video device and the target device; changing the current state of the video device and the target device into the occupancy state. The system comprises a plurality of video devices used for offering the video signal or overlaying the video signal; a video and audio matrix, the input end of which is connected to the video devices correspondingly while the output end is connected to more than one target device; a matrix control server used for controlling the video and audio matrix for connecting the route of corresponding video device and the corresponding target device. The video device can be shared through the method and the system, and the current device is used for maximization.