Music Fountain perfectly combines the water spray with the music, which could fully express the music spirit by phantasmagoric water features and colorful lights. In this system, the computer firstly identifies audio frequency and the MIDI signal, then converts them into signal instructions, finally output to control system to command the performance of water and lights. The water features perfectly corresponds with the music beat and color change of lights, that’s why it is called as music fountain. There are 2 types control mode in Music Fountain: PLC and multimedia. In the later mode, the operator could edit and change the water features’ performance according to his own understanding to the music by the friendly-operation interface of software.