An electronic device is connected to a second electronic device with a second universal serial bus (USB) Type-C port and a second power delivery controller through a connecting device. In the electronic device, a first power delivery controller is connected to a first USB Type-C port, so that the first power delivery controller communicates with the second power delivery controller to generate transmission handshaking information through the first USB Type-C port, the connecting device, and the second USB Type-C port. An analysis module is electrically connected to the first power delivery controller, to determine at least one function type transmissible between the electronic device and the second electronic device according to the transmission handshaking information. A reminder device is electrically connected to the analysis module and used for indicating the at least one function type supportable between the electronic device and the second electronic device.