A media processing system that produces discs with assured quality suited to long-term data storage. A data write unit writes data on a recording surface of a disc. A label print unit prints on the label side of the disc. An error rate measurement unit measures the error rate of the disc D after writing data is completed. An error rate evaluation unit determines if the media error rate measured by the error rate measurement unit is less than or equal to a preset threshold value. When the error rate evaluation unit determines that the media error rate is less than or equal to the threshold value, the label print unit prints a label image on the label side.