The paper explore the meaning of open access and online academic publishing. In teaching and learning, open access provide wide range barrier free information to teacher and learner. The paper discussed the various open access journals, online academic publishing and prominent open access publishers. It explained the roles of open access through online academic publishing and the roles of academic libraries in promoting open access. The paper recommended among others that academic library resources should be digitized to allow for open accesses and faculty should publish online in the digital age for open access.