In accordance with an embodiment, a method is applied to a first device; the first device is connected to a second device; the first device includes a first application; the first application includes a plurality of capability modules configured to be used for installation; and the capability module is configured to implement one or more functions. The method includes: The first device determines, based on capability information of the second devices, a first target capability module suitable for installation on the second devices from the plurality of capability modules included in the first application. The first device sends the first target capability module to the second devices.