The invention is applicable to the technical field of power systems, and discloses a power customer value evaluation method and system, and terminal equipment. The method comprises steps of: constructing a current value evaluation system and a potential value evaluation system; obtaining current value sample data according to the current value evaluation system, and obtaining potential value sample data according to the potential value evaluation system; performing clustering analysis of the current value sample data to determine a current value clustering result, and performing clustering analysis of the potential value sample data to determine a potential value clustering result; obtaining current value power data of a power customer according to the current value evaluation system, andobtaining potential value power data of the power customer according to the potential value evaluation system; and determining the current value category of the power customer according to the currentvalue clustering result and the current value power data, and determining the potential value category of the power customer according to the potential value clustering result and the potential valuepower data. The invention can improve the accuracy of the power customer value evaluation.