The invention relates to a two-stage regional user energy management method and system. The method comprises the steps: obtaining the power consumption plan of the regional user on the forecast day with the minimal electricity purchasing cost of the regional user acting as the objective; adjusting the power consumption plan of the regional user on the forecast day with the minimal comprehensive adjustment cost of the regional user acting as the objective; and distributing the adjusted power consumption plan of the regional user on the forecast day to the user. The technical scheme is based ona load aggregator cluster control mechanism, the two-stage optimization model of day-ahead and real-time energy management is established and the day-ahead energy management scheme is modified in real-time stage so that the power consumption schemes of all the users under the load aggregator are optimized, the photovoltaic utilization rate is maximized and the intelligent degree of power consumption of the users is greatly improved.