Power grid planning auxiliary system

The invention relates to a power grid planning auxiliary system. A load forecasting module forecasts load by adopting a method of combining a spatial load forecasting and total load forecasting, a result of the spatial load forecasting is adjusted on the basis of a result of the total load forecasting, and annual load capacity in the future is obtained. Different conditions in each area are considered, unity of the spatial forecasting result and the total forecasting result can be ensured, and situation of separating from development level in present of load can not happen.