[Purpose/significance] This paper evaluates the comprehensive quality of Library Science and Information Science's journals to find the quality changes in sample journals and purpose new thoughts for the journal evaluation research. [Method/process] This paper used the data from Chinese S&T Journal Citation Reports(2011-2017), choosed 7 terms after a series of filtering work, then set different weight through entropy method and factor analysis, evaluated the comprehensive scores and ranks for 34 kinds of Library Science and Information Science' journals during 2010-2016 by using TOPSIS model and built the comprehensive evaluation matrix. Finally, this paper used the clustering method to set the grades for the journals. [Result/conclusion] The results are as follows:① We should filter the attributes strictly when evaluate the qualification of Academic Journal; ②The common factors of each index tend to be stable; ③ The weight set for different indicators show these indicators' significance; ④ For the published articles, the quality is more important than the quantity; ⑤ "Matthew effect" exists in the evaluation of library and information science journals;⑥ Library and information science journals need further development.