As climate change worsens, temperature become hotter and hotter. This is a big problem. Temperature increasing influence behaviors and physiologies of life. According to an article of Nation Parks of Taiwan, abnormal temperature affect many life behaviors especially to aquatic. Our team find that hot weather increases water temperature and high temperature may reduce  aquatic habitats and their reproduce ability. This is a catastrophe to aquatic. we all know that any species is indispensable for a ecosystem. Our team decided to design a equipment which can change water temperature of lack surface to give aquatic a suitable living environment.