Disclosed therein are a method and a system for anodizing metals. The anodizing system includes: an electrolytic bath storing electrolyte of a predetermined amount therein; an anode line mounted on an upper portion of the electrolytic bath, the anode line having insulation blocks for dividing the anode line into several sections; a cathode line disposed outside the anode line, the cathode line having insulation blocks mounted correspondingly to the insulation blocks of the anode line for dividing the cathode line into several sections; a chain connected to a driving sprocket and a driven sprocket inside the anode line, the chain having a plurality of transfer blocks; and hangers electrically connected to the anode line and adapted to fixe and support objects to be plated, which are deposited in the electrolyte.