Prison libraries play a significant role in ensuring incarcerated individuals’ right to access information and to support their reentry. However, prison libraries in South Korea are valued more for their existence than for their function and remain largely inactive. Comparatively, the United States prisons had relatively greater openness and accessibility. Therefore, we have interviewed 18 stakeholders of library staff and collaborators from both South Korea and the United States to explore possible plans for improving prison libraries in South Korea. Based on the examination of the interviews, the study identified three key discussion points: stakeholder perceptions, prison library system, and collaboration for prison libraries. Collaborative systems are the key that can solve the lack of qualified staff and institutional support. This research is expected to lay the foundation for further studies on prison libraries and serve as critical reference material for future policy development.