The aquaculture along Taiwan's coasts now confronts the threats, water resources and land subsidence. The concept of this study is modified from wastewater treatment wetlands. The artificial floating beds with vegetation are applied to be aquatic plants, and ecological aquaculture transformation for fish farms can be easily done. Through the water quality monitoring, the concentration of total nitrogen and nitrate are obviously reduced in the fish farm with artificial floating beds. Moreover, the objectives of water purification and the water consumption efficiency improvement are proved in this study.