Wireless Charging System, Wireless Charging Method, and Device To-Be-Charged

Provided are a wireless charging system, a wireless charging method, and a device to-be-charged. The wireless charging system includes a wireless charging device and a device to-be-charged. The wireless charging device is configured to conduct wireless communication with the device to-be-charged through communication control circuits to adjust a transmission power of the wireless charging device. In addition, the device to-be-charged has a step-down circuit.