A graphics provider terminal samples, through a graphical interface provided by a Canvas specification, a graphic generated by a web browser of the graphics provider terminal based on the Canvas specification to obtain graphics information according to a preset sampling rate. The graphics provider terminal packs the graphics information to obtain a message packet based on a preset graphics sharing agreement; and sends the message packet to a graphics exchange server through a persistent connection between the graphics provider terminal and the graphics exchange server. The graphics exchange server unpacks the message packet to obtain the graphics information and sends the graphics information to a graphics receiver terminal through a persistent connection between the graphics receiver terminal and the graphics exchange server.