The invention relates to a distributed power source prosperity synthesis index prediction method and system. The method comprises steps that data acquisition based on evaluation indexes of the pre-established distributed power source synthesis degree is carried out to acquire index data; the acquired index data is processed according to evaluation index types; the index data after processing are synthesized to acquire a prosperity index; the evaluation index types of the distributed power source synthesis degree comprise quantitative indexes and qualitative indexes. The method is advantaged inthat based on the development environment and characteristics of the distributed power source, the method integrating set-valued statistics with composite index is utilized to discriminate and predict the prosperity of the distributed power source from the qualitative and quantitative aspects, the relevant decision-making basis is provided for finding out whether development of the distributed new energy is in overheating, under-cooling and moderate rends timely, and healthy development of the distributed energy in a rational and orderly manner is guided.