The invention discloses a wind power plant power-generation optimization method considering real-time power price change. The wind power plant power-generation optimization method comprises the following steps: (1) control quadrants of a wind turbine generator and an energy storage device are made; (2) a wind power plant control strategy threshold value is set; (3) a control strategy is determined; (4) the time period T is set and calculated; (5) according to the probability statistical result, a power price expectation value in the next period is calculated and compared with the power price of the current time period, when the expectation value is larger than the power price of the current time period, power energy is absorbed in the current time period, if the power price of the next time period is smaller than the power price of the current time period and is in the economy period, the power energy is released, and the economy period is decided by the real-time power price; (6) according to a wind power plant power-generation revenue model, the energy storage control quantity of the current time period is calculated; and (7) the energy storage device and the pitch angle of the wind turbine generator are regulated and controlled according to the calculation result. The energy storage effect of the energy storage device and the wind turbine generator is given into full play, according to change of the real-time power price and the power generating capacity, power-generation internet strategies of the different time periods are regulated and controlled, and thus the power-generation economic benefits of the wind turbine generator are good.