An electronic device includes a key circuit, a first universal serial bus (USB) circuit coupled to the key circuit, where the key circuit outputs different signals when different keys on the key circuit are pressed. The first USB circuit is configured for USB communication, and a first power delivery (PD) circuit is coupled to the key circuit and configured to convert a signal output by the key circuit into a PD signal and transmit the PD signal to a second electronic device to enable the second electronic device to process the key operation when the first USB circuit is in a power-off state and a key operation is performed on the key circuit.