Embodiments of the present invention disclose a charger integrating a network interface conversion apparatus, which is used with a wireless mobile gateway device. The charger includes a first interface, a power interface, a second interface, a charging circuit, and a network interface adapter circuit. The power interface is connected to an input end of charging circuit. An output end of the charging circuit is connected to the first interface and a power supply terminal of the network interface adapter circuit. The second interface is connected to a signal terminal which has a corresponding format and is of the network interface adapter circuit, and the first interface is connected to a signal terminal which has a corresponding format and is of the network interface adapter circuit.