The invention discloses a comprehensive evaluation method for a strong smart power grid, which includes the establishment of a strong smart power grid evaluation system (1). The system comprises a first grade technology maturity evaluation index system, a first grade project maturity evaluation index system, and a first grade regional intelligence evaluation index system. Each first grade index system comprises three lower grade indexes and an index data base is founded incorporating all the abovementioned indexes of different grades. The method also comprises an extreme value processing step (2), which unifies the fourth grade indexes in the index data base; the method comprises a third step of weight determination of the second-grade indexes, the third-grade indexes and the unified fourth-grade indexes based on an order relation method; the method comprises a fourth step of comprehensively evaluating the fourth grade indexes with the weight determined in the third step of the method to obtain the scores for the indexes at various grades. The method comprises a fifth step of the adjustment of index weight, the prediction of relevant indexes and the analysis on the uncertainty of the scores of the first grade indexes. The evaluation method of the invention makes complete evaluation; and the method has certain significance for macro-grasp of power grid information.