Abstract: Based on the complex reservoir group of supply and water diversion systems in Dalian, the author advances the framework of a system of real-time scheduling and a coupling structure pattern. This paper considers "total amount of control, coupling nested, multidimensional decision-making, real-time correction" as the core of real-time scheduling process. In the aspect of runoff forecasting, this paper proposes the long-term inflow runoff forecast methods of reservoir group of supply and water diversion systems based on transcendental probability, combined with mid-GFS numerical prediction technology for rolling forecast incoming runoff during the different periods. In terms of a scheduling model, this paper uses the new method based on dynamic programming and conventional modeling to provide a reference for scheduling. A case study shows that this real-time scheduling system implements rolling forecast and a rolling scheduling, which proves that the system can be implemented in real time. In the real-time dispatching system, the macro total control is combined with the local adjustment of the scheduling objective and coupled with the scheduling decisions related to nested features with different time scales, thereby proving the applicability of the system. This result has important reference value for similar systems for real-time scheduling.