Abstract: After the publication of ‘The Third Wave of Science Studies’ by Harry Collins and Robert Evans, Sheila Jasanoff and Brian Wynne both expressed their views on democratization of science of great difference, then the two sides fall into the debate of the limit of participation. The two sides focus on science, but ignored the locality of democracy especially and followed the current democratic ideals without rethinking. Therefore, the essence of the debate lies on which democratic ideal is suitable for democratization of science. Political philosophy analysis will promote the understanding of the theoretical basis of democratization of science.