Disclosed is a method for manufacturing anodic metal-oxide nanoporous templates with high-yield and in an environmentally-friendly manner. The method includes anodizing a metal specimen and detaching nanoporous anodic oxide layers, which are formed on more than one surface of the metal specimen due to the anodizing, from the metal specimen, wherein the detaching of the nanoporous anodic oxide layers from the metal specimen includes applying a reverse bias to the metal specimen in the same acidic electrolyte used for anodization.