Ultrasonic beauty is generated a high frequency alternating current by generator , which make the piezoelectric chip to generate ultrasonic waves. It mainly uses the mechanism of ultrasonic waves on human skin and superficial tissues. In the medical, the doctor puts the piezoelectric ceramic probe on the inspection place of the human body, and sends an ultrasonic wave after being energized. When the human body touches the tissue of the human body, it generates an echo, and then receives the echo, which is displayed on the fluorescent screen, and the doctor will can understand the internal conditions of the human body.