The Operation of Reservoir was affected by water supply demand, power generation and other factors because of its regulation ability. Such operation behavior belongs to multiple objective decision. Based on the study of Nash Cournot equilibrium and Chatterjee and Samuelson bargaining model which was on the Bayesian game situation in game theory, an operation decision model of cascade reservoirs had been established. Because of the different information content received by the decision maker, the model also established static and dynamic game program model to do such research. This model was applied in the operation decision study of a hydro junction in Minjiang River, Sichuan. The study indicated that the model can analyze and simulate the activity of cascade reservoirs operation. It aims to the decision of risk reduction, basin operation equilibrium and management tactics’ optimization.