It is a very inevitable choice to improve the efficiency and level of reservoir water administration supervision with the help of modern information technology under the current situation. A complete reservoir water administration and supervision system for Hedi reservoir is developed by integrating unmanned aerial vehicle survey, map cache, remote sensing inversion of water quality and “Internet+” technology. The supervision platform achieved the goal of air-space-ground integration for reservoir water resource, giving support for reservoir management and water law enforcement, maintaining ecological balance in reservoir area, and ensuring the water safety of production and living. Practical application of the system demonstrates that the supervision platform which is based on the integration of massive, multi-source and heterogeneous data, can effectively, dynamically and comprehensively grasp and monitor different water-related behaviors, water quality safety conditions and reservoir operation status within the reservoir area. This platform can also promote the reservoir management and water law enforcement to be more scientific, accurate, timely and efficient.