The rapid integration of artificial intelligence (AI) into higher education has significantly transformed information access, creation, and use, necessitating the development of AI literacy among academic communities. Academic libraries, traditionally responsible for information literacy instruction, are increasingly assuming a central role in promoting AI literacy. This study adopts a systematic review design following PRISMA guidelines to examine global practices implemented by academic libraries for AI literacy education. Data were collected from Google Scholar, ResearchGate, and ONOS, focusing on Library and Information Science journals and conference proceedings published between 2018 and 2025. The findings reveal that academic libraries employ diverse instructional approaches, including workshops and training sessions, online research guides, MOOCs, and embedded curricular instruction. These initiatives emphasize not only technical competencies but also ethical awareness, critical evaluation, and responsible use of AI technologies. The study concludes that a structured, ethical, and sustainable framework is essential for effective AI literacy implementation, positioning academic libraries as key facilitators of responsible AI engagement in higher education.