The invention provides a wind power plant energy management system which is suitable for execution in computing equipment. The method is characterized by comprising the following steps: judging whether the wind power generator set is an under-power generator set or an over-generating generator set according to the operation state of the wind power generator set; meanwhile, performing statistics ofthe under-power value or the over-power value of the wind power generator set; calculating the under-power value of all the under-power units in the wind power plant; calculating the over-generatingpower values of all the over-generating units in the wind power plant; distributing the generated unit over-generating scheme to the over-generating units according to the calculated under-power values of all the under-power units and the over-generating power values of all the over-generating units; and when the wind speed of the wind power plant reaches the wind speed above full capacity, the over-generation capacity of the normally operating units is utilized to make up for the power generation loss of the under-generation units under the condition that the full-field power generation powerdoes not exceed the rated output of the wind power plant so as to maximize the power generation capacity of the full-field units and improve the power generation of the full field.