A Very famous industrial park in Taiwan, Changhua Coastal Industrial Park has many manufacturers including Food industry, glass industry, textile industry, plastic industry, chemical industry, metal industry, power industry, steel industry, machinery industry and recycling industry to build their factories within the industry park. In the past, the chemical waste raised the explosion for many times. It was because the high density of the concentration, temperature, and powder during the operation. By installing the temperature and gas detector to activate the water mist system, it indeed have prevent from the emergency including fires & explosion because it had happened again.