The invention provides a plug-in update method and device. The method comprises the following steps: scheduling a plug-in update configuration file transmitted to a plug-in host by a cloud server, wherein the plug-in update configuration file comprises a first plug-in information list of all plug-in information and a preset plug-in update rule; calling a second plug-in information list which is stored in the plug-in host and comprises installed plug-in information in the plug-in host; comparing the first plug-in information list and the second plug-in information list, and selecting a plug-in needing to be updated by the plug-in host to be added into an update queue according to the plug-in update rule; and updating the plug-in in the update queue. According to the technical scheme provided by the embodiment of the invention, the plug-in is intelligently updated, the plug-in version control, compatibility control and other problems are solved, and the breakdown ratio of plug-in application is reduced.