When is applied for ultrasonic welding equipment and ultrasonic cleaning equipment. It mainly uses high-power emitting piezoelectric ceramics. Ultrasonic transducer is a device that can convert high frequency electric energy into mechanical energy. Ultrasonic transducer is used as energy conversion device. The function is to convert the input electrical power into mechanical power ( ultrasonic waves) and transmit, while it consumes a small amount of power itself. The transducer is a device that converts electrical energy and mechanical energy by piezoelectric effect, and amplifies the front and back of the acoustic impedance by acoustic impedance. Ultrasonic cleaning produces the ultrasonic vibration by the transducer. The high-pressure cavitation generated by the cavitation effect under the water which is the object to be cleaned to achieve a good cleaning effect.