With the rapid development of Internet of Things technology, home intelligence has become an inevitable trend. The design of the intelligent ecological fish tank system aims to improve the automation level of ornamental fish farming and promote the healthy and sustainable development of the ornamental fish industry through sensor technology, wireless communication technology, and integrated circuit technology. The system takes the living environment of ornamental fish as the monitoring object, and adopts the sensor system to collect the key environmental indicators such as the breeding environment temperature, water quality, pH, light intensity in real time. On the basis of the monitoring environment, combined with the control technology, the system can realize the functions of water temperature regulation, feeding control, driving water change, oxygen addition, etc., ensure the stable and suitable breeding environment, create suitable living conditions for different varieties of ornamental fish, and achieve scientific and rational cultivation of ornamental fish. The implementation of this system can significantly improve the intelligence level of ornamental fish farming, reduce labor costs, and improve the survival rate of ornamental fish, which has certain application value.