An associated plug-in management method, device, and system are provided. A first associated plug-in and a second component that uses the first associated plug-in are determined by obtaining description information of the first associated plug-in and information about the second component that uses the associated plug-in, where the description information of the first associated plug-in and the information about the second component are provided by a first component; and then, based on the information about the second component and the description information of the first associated plug-in, the first associated plug-in is installed onto a device on which the second component is located. Thus decoupling during deployment of components related to an associated plug-in is implemented.