Background and Objective: Information security is a vital issue in organizations and this is especially important in academic libraries due to the specific type of visitors, exchange and transfer of information to its users. Therefore, the purpose of this study is the effect of developing the dynamics of library software system on information security management (Case study: Libraries of Islamic Azad Universities). Research Methodology: The present study is a descriptive-correlational study. The statistical sample includes 240 employees of the central libraries of the Islamic Azad Universities of the country in the academic year 1300-1400, who participated in the research by census. The required data were provided through Ashourizadeh Information Security Management Questionnaire (2012) and a researcher-made questionnaire on system dynamics. The face, content and structure validity of the tools were confirmed and their reliability was calculated using Cronbach's alpha coefficient for information security management and system dynamics questionnaires of 0.85 and 0.83, respectively. Descriptive and analytical statistics and SPSS and Lisrel software were used to analyze the data. Results: The findings showed that system dynamics has five main factors "information storage and retrieval, usability, security, standards and accessibility". From the employees' point of view, the status of system dynamics, information security management and each of their components in the libraries of Islamic Azad universities is favorable. Also, the results showed that the development of library software system dynamics on information security management It has a positive and significant effect. Conclusion: The findings of this study will be useful in identifying the effects of developing the dynamics of library software system in information security management of libraries of free universities in the country.