Layout switching method and system based on video communication desktop content

The invention provides a layout switching method and system based on video communication desktop content. The method comprises the steps that shared content is captured and analyzed, and a shared content analysis result is obtained; the receiving end obtains the compressed code stream and the shared content analysis result, and obtains the display time required by the shared content according to the shared content analysis result; the receiving end begins to display in a first layout, countdown is carried out with the display time as an initial value, and the first layout is a layout in which the shared content is displayed in a large picture, and the keynote speaker picture is displayed in a small picture or not; after the countdown of the display time is finished, the receiving end automatically switches to a second layout, and the second layout is a layout which displays the keynote speaker in a large picture and displays the shared content in a small picture or does not display the shared content. Accordi