The invention relates to a method and system for constructing a photovoltaic power generation scene. The method comprises the following steps of: determining the mean square deviation of the autocorrelation coefficients of each photovoltaic field station in the photovoltaic power generation scene according to the autocorrelation coefficients of the historical power series and the hysteresis historical power series of each photovoltaic field station in the photovoltaic power generation scene, and the autocorrelation coefficients of the generated success rate series corresponding to the historical power series and the hysteresis generation success rate series of each photovoltaic field station; The mean square deviation of partial autocorrelation coefficients of each photovoltaic field station in the photovoltaic power generation scene is determined according to the partial autocorrelation coefficients of the historical power series and the hysteresis historical power series of each photovoltaic field station in the photovoltaic power generation scene, and the partial autocorrelation coefficients of the corresponding generation success rate series and the hysteresis generation success rate series of the historical power series. The photovoltaic power generation scenario is constructed by using the mean square deviation of autocorrelation coefficient and the mean square deviationof partial autocorrelation coefficient. The invention restricts the temporal correlation in the photovoltaic power generation scene construction, and improves the modeling accuracy of the photovoltaicpower generation scene construction.