Abstract: With a view to improving product quality, the concept of generalized product quality is proposed and analyzed in depth to frame a comprehensive fuzzy evaluation system for product quality, which includes all the constructional, operational and technological performance and functions and takes account of the hierarchy and complexity of such an evaluation system. In the system the weighted value for each and every evaluation index is determined by combining the entropy weight with subjective weight so as to make the evaluation more objective and scientific. Compared with the method of comprehensive fuzzy evaluation, the evaluation system thus framed gets rid of the empirical subjectivity in determining index weight, thus enhancing the dependability of the weight and, as a result, such an evaluation will be more reliable.