For the power system with pumped hydro storage and wind power, and based on the probability distribution characteristics of wind power, and combining the difference of operation characteristics between thermal power units and pumped hydro storage units, a new cooperation method between pumped hydro storage and wind power is presented. The core is to distinguish the role of thermal power units and pumped hydro storage units in the process of coping with the uncertainty of wind power. To save the limited regulatory resources of pumped hydro storage and improve the thermal power units reserve response effectiveness, the cooperation between the pumped hydro storage and wind power is used to deal with the wind power prediction error which the probability is small and the amplitude is large, and the conventional wind power fluctuation is still dealt by thermal power units. On the basis of above, the cooperation between pumped hydro storage and wind power is integrated into unit commitment, and a combined unit commitment model of wind power-hydro power-thermal power is built. The 26-node system is used to verify the effectiveness in the reduction of thermal power units’ frequent startup and shutdown and the improvement of wind power accommodation.