The invention provides a power meteorological data fusion method and system. The power meteorological data fusion method comprises the steps of collecting power meteorological data from at least two meteorological data generation channels; Respectively partitioning the collected power meteorological data according to space, time and meteorological factors; And fusing the partitioned electric powermeteorological data. According to the method and the system, the multi-source power meteorological data collected from various meteorological data generation channels are blocked and fused and integrated around the characteristic of heterogenous heterogeneity of the power meteorological data, assimilation of the multi-source heterogeneity observation data is directly realized, and the power meteorological numerical weather forecast precision is obviously improved.