The heterogeneous photocatalytic processes have exhibited tremendous potential in the field of solar energy utilization and environmental remediation. Next to TiO2, ZnO has been widely used as a promising photocatalyst material in recent years. However, several noticeable drawbacks make it less effective, such as poor solar-light harvesting, and rapid recombination of the photo-excited charge carriers. The decoration of noble metal nanoparticles on ZnO surfaces is a feasible strategy by its localized surface plasmon resonance (LSPR) absorption for aggrandizing the visible absorption of ZnO, meanwhile the formation of the Schottky barrier at the metal-semiconductor interface can effectively separate the photo-induced charge carriers. Among them, due to the high conductivity, antimicrobial activity, mechanical thermal strength and electrical double layer capacitance of silver, Ag decorated ZnO (ZnO/Ag) nano-photocatalysts have exhibited a remarkably photocatalytic efficiency and high cost performance for degradation of organic pollutants, and been endowed them with growing applications. In this review, we focus on the recent advancements (including the fundamental degradation mechanism, synthesis methods, corresponding applications and optimized strategies related to the ZnO/Ag photocatalysis) in ZnO/Ag-based photocatalysts for visible light-driven photocatalytic degradation, and concluding with a perspective on the future direction and prospects of this type of nanocomposite photocatalysts.