The invention discloses an energy storage configuration method for smoothing the power fluctuation of a wind and photovoltaic power storage system. The method comprises the following steps: firstly, fixing distributive generating system composition of stored energy to be distributed, definitizing historical generating data of various distributive generating equipment of the system, and a forming distributive generating power sample, secondly, performing discrete Fourier transform to power output sample data, thirdly, fixing a stabilizing target of the power fluctuation of the distributive generating system, fourthly, fixing a theoretical value required for energy storage power, fifthly, correcting the power requirement of an energy storage battery, and fixing final energy storage power, and sixthly, fixing the capacity requirement of the energy storage battery, and accomplishing the energy storage configuration. By configuring an energy storage system, distributive power output power fluctuation is smoothed through the operation characteristics that the system can be charged and discharged of the system, and as a distributive power source is accessed to a power grid, the stable operation of the power grid is guaranteed.