A hub is suitable for electrically connecting an electronic device, an AC power supply and at least one mobile device that are located outside the hub. The hub includes a power module, a USB connection terminal, a USB Type-C connection terminal, a power distribution control circuit, and a first PD controller. The power module is electrically connected to the AC power supply. The USB connection terminal is electrically connected to the power module and the mobile device. The USB Type-C connection terminal is electrically connected to the power module and the electronic device. Besides, the power distribution control circuit is electrically connected to the power module. The power distribution control circuit is used for measuring a measurement value of the power module. In addition, the first PD controller is connected between the USB Type-C connection terminal and the power distribution control circuit.