A photocatalyst, AgInW2O8, with a layered structure was synthesized. The physical and photophysical properties of the photocatalyst were characterized by XRD, BET measurement, UV-visible diffuse reflectance, and photoluminescence, respectively. The photocatalytic properties of the photocatalyst for H-2 evolution with Pt cocatalyst from CH3OH/H2O solution and O-2 evolution from AgNO3 solution were observed under UV and visible light irradiation. The AgInW2O8 photocatalyst presented not only the activity of O-2 evolution but also the activity of H-2 evolution. Also the photocatalyst showed the ability to evolve H-2 from pure water under full arc irradiation. On the basis of all the results, the band structure of the photocatalyst was discussed.