Wireless charging device, user terminal and wireless charging method

The invention provides a wireless charging method comprising the steps that infrared light emitted by an infrared light emitting module is received by a receiving mirror surface; the illumination intensity and the incident angle of infrared light received by the receiving mirror surface are sensed; an optimal receiving angle is determined according to the illumination intensity and the incident angle of infrared light; the receiving mirror surface is driven to rotate to the optimal receiving angle; and infrared light received by the receiving mirror surface is converted into charging electric energy so as to charge a user terminal. Besides, the invention also provides a wireless charging device applying the method and the user terminal. According to the wireless charging method, distance range of wireless charging can be increased so that synchronous charging of multiple user terminals can be realized, and charging efficiency can be enhanced.