Purpose: One of their major challenges lies in securing adequate funding and adopting innovative entrepreneurial approaches to ensure organizational development and long-term sustainability. This study aims to identify strategies for diversifying financial resources and fostering entrepreneurship in public libraries, drawing on both domestic and international experiences to propose an effective framework for enhancing their financial and managerial capacity. 
Method: This qualitative study was conducted through a systematic review, following the seven-step method of Sandelowski and Barroso (2006). The study population included domestic studies published between 2009 and 2021, and international studies published between 2010 and 2021, focusing on financial diversification and entrepreneurship in public libraries. After a multi-stage screening process, 30 studies were selected for final analysis. 
Results: The results reveal 42 strategies for diversifying the revenue streams of public libraries, categorized into six overarching themes: cultural and economic initiatives in specific regions, public library governance, development of infrastructure and information technology, enhancement of library services, cultural programs and activities, and commercial and entrepreneurial initiatives. Key strategies include AI-driven needs assessment and targeted resource distribution, encouraging philanthropic contributions, securing legal budget allocations, designing digital libraries, collaborating with artistic organizations, establishing book cafés, strategic planning, organizing trade exhibitions, and promoting e-commerce.
Conclusion: Diversifying the financial resources of public libraries requires a comprehensive approach that simultaneously strengthens infrastructure, modern technologies, public participation, and entrepreneurial initiatives. Implementing these strategies can enhance the financial sustainability of libraries and position them as dynamic and influential institutions in cultural and educational development.