The embodiment of the invention discloses a networking mode evaluation method and device of an electric power communication. The method comprises following steps of calculating multiple evaluation indexes generated by planning the electric power communication through adoption of each networking mode in multiple networking modes; establishing a target matrix according to the multiple evaluation indexes corresponding to each networking mode in the multiple networking modes; calculating related matrixes corresponding to the target matrixes, all feature values of the related matrixes and the sum of all the feature values; determining target feature values from all the feature values according to the ratios of each feature value in all the feature values and the sum of all the feature values; calculating feature vectors corresponding to the target feature values; establishing an evaluation function according to the feature vectors; calculating evaluation function values corresponding to each networking mode in the multiple networking modes; and taking the networking mode corresponding to the minimum evaluation function value as the networking mode with the lowest cost. According to the method and the device, the objectivity and accuracy of evaluating the cost of different networking modes can be improved.