Virtual character expression driving method and system

The embodiment of the invention discloses a virtual character expression driving method and system. The method comprises the following steps: acquiring voice information of a user; analyzing the volume information of the voice information to obtain character information of the voice information; performing volume analysis on volume information in the voice information to obtain a corresponding mouth shape expression instruction; combining the character information of the voice information and the corresponding mouth shape expression instruction for semantic calculation to obtain a response; and converting the obtained response into response voice, and converting the response voice into expression and mouth shape animation data to drive the virtual character to make a corresponding expression and mouth shape. Generation of expression animations is simplified, and the invention can be widely applied to scenes such as intelligent sound boxes, intelligent robots and chat robots, so that the products are personifi