Disclosed are a live broadcast display method, device and system, relating to the field of multimedia processing technology. The method comprises: receiving a live broadcast video stream sent by a server; detecting whether a second display device is present when the live broadcast video stream is obtained by merging a plurality of main video streams, a display capability of the second display device being superior to that of the first display device; and when the second display device is present, sharing the live broadcast video stream to the second display device for display. The present invention resolves the problem in the prior art in which a screen for a video stream recorded and sent by a main client cannot be displayed completely when a first video stream and a second video stream are cropped and merged into a processed live broadcast video stream and sent to the first display device for display, thereby achieving the clear and complete display of the screen for the video stream through the second display device having better display capability, and allowing a user to watch a complete video screen.