A method for setting discrimination criterion information pieces for one or more additional denominations in a coin discrimination apparatus is provided, which eliminates the task of visiting the installation location of an existing coin discrimination apparatus to exchange this apparatus for a new one including discrimination criterion information pieces for one or more additional denominations and the task of setting discrimination criterion information pieces for the one or more additional denominations manually in the apparatus. A target denomination is designated from current denominations whose discrimination criterion information pieces are stored in a coin discrimination apparatus. Then, discrimination criterion information pieces for an additional denomination are calculated based on discrimination criterion information pieces for the target denomination, target denomination standard information pieces corresponding to the discrimination criterion information pieces for the target denomination, and additional denomination standard information pieces corresponding to the discrimination criterion information pieces for the additional denomination.