Purpose: Since the Knowledge management is a systematic and deliberate attempt to develop, promote, and apply existing knowledge in organizations to create positive value for success and achieving goals, The purpose of this study is to investigate the application of knowledge management criteria to improve the quality of information services in public libraries in Kerman Province. Methodology: This study is a survey research and of course, library approach has been used as well. Data were collected randomly by distributing 144 questionnaires among public libraries employees in Kerman province. Findings: Evaluation of Data analysis findings were presented using SPSS software., knowledge management criteria, organizational culture, strategy, human resources, information technology, and direct and meaningful relationships with the quality of the public libraries and information services in the province. Conclusion: Using the criteria of knowledge management in public libraries, quality of the library information service are improved. In IT variables regression analysis, coefficient determination with 0. 37 and coefficient determination with 0. 30 have the greatest impact on the quality of library information services.