A charge apparatus including a natural energy conversion module, an energy converter, an energy transmitter, an energy receiver, and an electricity storage device is provided. The natural energy conversion module receives the natural energy and converts the natural energy into a first electric energy. The energy converter is electrically connected to the natural energy conversion module and converts the first electric energy into a wireless energy. The energy transmitter is electrically connected to the energy converter and transmits the wireless energy. The energy receiver receives the wireless energy and converts the wireless energy into a second electric energy to charge an external apparatus. The energy transmitter monitors the current charge status of the external apparatus so as to adjust transmitting the wireless energy. The electricity storage device is electrically connected to the natural energy conversion module to store the first electric energy.