Objective A comprehensive evaluation of the quality of medical service from January to December in 2007 was conducted in order to provide scientific policies for far-flung work and create bigger benefit in a certain hospital. Methods Apply factor analysis ascertains the weight,and we carry through a comprehensive evaluation of the quality of medical service combine with weighted TOPSIS to the hospital. Results The quality of medical service of hospital in 2007. The months of April,July , November better; February,May, October worse. The results accord with reality. Conclusion Research shows comprehensive evaluation of hospital medical quality needs a scientific target system. Using factor analysis and combining weighted TOPSIS in comprehensive evaluation is more objective and more scientific and authentic as take full advantage of the original source.