The working principle of the music fountain is to control the water column according to the played music to achieve the effect of synchronization with the music, and the water column is controlled by a water pump, which is composed of a three-phase asynchronous motor. If the speed of the three-phase asynchronous motor is fed into a power frequency power supply, the speed will not change. The frequency converter is a device specially designed for motor speed regulation. The rotating speed of the motor is controlled by the frequency converter to change the water column.

The control frequency changes the rotating speed of the motor and also changes the pressure of the water pump. The different frequencies of the music are processed by the single chip microcomputer and sent to the control end of the variable frequency motor, so that the rotating speed of the motor changes with the tone, rhythm and strength of the music, and the pressure of the water pump changes accordingly, thus the water type sprayed changes in height. In addition, several sets of equipment control fountains for multiple sets of nozzles. The rhythm and intensity of music are converted into control signals, which in turn control the voltage control device. After the power supply passes through the voltage control device, the output voltage also changes with the change of music, and then the motor and water type are controlled to form a music fountain with varied, unique and graceful shapes.