The development of computer technology and information is rapidly increasing, the communication to be one very important thing. Especially in this era of globalization, which allows us to master a wide range of musical instruments. One of the classics is gamelan fattened fowl. Of course, the original musical bali is worth to be preserved, so it is fitting gamelan conservation efforts should be enhanced by many, both for public and for public education.With the Gangsa Balinese Gamelan Learning System Based Android public can facilitate in preserving the gamelan fattened fowl. This system contains learning about the tone gamelan fattened fowl using slendro and pelog. In making this system, there are several stages through which the system analysis, system design and system implementation. In the analysis phase of the system must be analyzed application to be made and that is making UML design phase and interface design.