A battery charging device with multiple power sources comprises a battery device having a battery; a power input adjusting and charging circuit connected to an external power source; a power charging control circuit for detecting voltages of the battery; a power charging device of an Ethernet power supply device having an input connected to a Ethernet power supplying device and having an output connected to a charging circuit; the charging circuit being connected to the battery device; a power charging control device for an Ethernet power supply device for controlling a charging voltage of the charging device to increase to a uniform charging voltage; and an inter-control device having a driver and a switch device; the driver being installed to the power input adjusting and charging circuit, and the switch device being installed to the power charging control device for an Ethernet power supply device.