The present invention relates to a simultaneous analysis method for a target using a plurality of metal nano-tags and, more particularly, to a simultaneous analysis method for a target using a plurality of metal nano-tags, wherein the method fuses a nano-particle technology on the basis of an antigen-antibody reaction, which is a conventional biological immune response, and simultaneously diagnoses a plurality of target materials by using a plurality of antigen-antibody reactions and a plurality of metal nano-tags, thereby enhancing diagnostic effect.