Abstract: In order to rapidly improve aquiculture water quality, the existing circumstances and problems of water eutrophication in our country was analysed in this paper, and a water oxygenation system powered with solar battery was developed. The system is controlled by singlechip microcomputer, and the structure features, hardware and software implementation methods of the system were introduced in detail. The system has been applied in the purification of park fishpond and aquiculture of carp. The results showed that the system realized real-time control for the dissolved oxygen and pH of a fishpond, and make more environmental factors keep in the best value ranges. The study can provide a new achievable technical measure for enhancing the water self cleaning capacity and aquaculture level.