With the view to investigate the details about industrial gas leakages system, it is proposed to undertake the research work of development about PIC microcontroller based embedded system for Monitoring, detection and to control the industrial gas leakage. The hardware part of the project is designed to realize embedded system. Therefore, this requires software is also developed in micro C pro compiler. Thus the hardware and software required for this project is developed in our laboratory. Here system is demonstrated particularly hydrogen sulfide gas leakage detection and control. Hydrogen sulfide is a corrosive substance and the main toxic effects. For example if you spilled a bottle of concentrated H2S on the floor, you would smell a strong H2S odor. If you were exposed to very high levels of H2S, you would experience more harmful effects. H2S is used widely and in large quantity for a variety of purposes. More than 80% H2S are produced is used for agricultural purposes; less than 2% used for Refrigeration. However, monitoring and leakage detection of such large amount of H2S gas concentration is necessary and carried out using designed system around smart micro controller.