“This study aims to achieve stable control and green governance of aquaculture water bodies, utilizing multi-source data fusion, spatiotemporal prediction, constrained decision control, and semiconductor photocatalytic in-situ purification methods to research the state recognition, risk warning, regulation decision-making, and pollutant reduction of special fish aquaculture water bodies. An intelligent prediction and photocatalytic purification collaborative system has been established to provide a solution to the water quality control problems in the localization of high-value special fish aquaculture in the north of China.”