Musical 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, and then converts into instructions and output to control system to command the water performance and lights. It looks like the water is dancing with the rhythm and beat of the music. So it is also called as Dancing Fountain. There are 2 types mode of control in the Musical Fountain: PLC and multimedia. In the later mode, client could edit the water feature performance according to his understanding to the music with the friendly-operation software Interface to make the water dance with the music melody.