A data management system that controls data related on a casting on a casting process, that is connected to a casting equipment, the casting equipment including: a casting apparatus configured to form the casting by using upper and lower molds (1, 2) into which molten metal is poured by using gravity, the upper and lower molds (1, 2) being able to be opened, closed, and tilted; and an engraving apparatus configured to engrave a product identifier on the casting, the casting apparatus includes: an upper frame to which the upper mold is attached; a lower frame to which the lower mold is attached; a mold closing mechanism that is provided in the upper frame to move up and down the upper mold, or that is provided in the lower frame to move up and down the lower mold; a pair of main link members each of which has upper and lower ends that are rotatably coupled to the upper and lower frames (5, 6), respectively, to be oppositely arranged, and has a central portion that is provided with a rotating shaft; a pair of auxiliary link members that is arranged parallel to the respective main link members, and each of which has upper and lower ends that are rotatably coupled to the upper and lower frames (5, 6), respectively, to be oppositely arranged, and has a central portion that is provided with a rotating shaft; and drive means that is provided to be coupled to the rotating shaft of one of the pair of main link members, and that tilts the upper mold and the lower mold or horizontally moves the molds away from each other, and the upper frame, the lower frame, the main link member, and the auxiliary link member, constitute a parallel link mechanism, the data management system comprising: a storage device configured to store the data; an acquisition unit configured to acquire the product identifier and a tilting pattern of each of the upper and lower molds (1, 2) in the casting apparatus; and a control unit configured to associate the product identifier with the tilting pattern acquired by the acquisition unit, and to cause the storage device to store the associated product identifier and tilting pattern. an upper frame to which the upper mold is attached; a lower frame to which the lower mold is attached; a mold closing mechanism that is provided in the upper frame to move up and down the upper mold, or that is provided in the lower frame to move up and down the lower mold; a pair of main link members each of which has upper and lower ends that are rotatably coupled to the upper and lower frames (5, 6), respectively, to be oppositely arranged, and has a central portion that is provided with a rotating shaft; a pair of auxiliary link members that is arranged parallel to the respective main link members, and each of which has upper and lower ends that are rotatably coupled to the upper and lower frames (5, 6), respectively, to be oppositely arranged, and has a central portion that is provided with a rotating shaft; and drive means that is provided to be coupled to the rotating shaft of one of the pair of main link members, and that tilts the upper mold and the lower mold or horizontally moves the molds away from each other, and a storage device configured to store the data; an acquisition unit configured to acquire the product identifier and a tilting pattern of each of the upper and lower molds (1, 2) in the casting apparatus; and a control unit configured to associate the product identifier with the tilting pattern acquired by the acquisition unit, and to cause the storage device to store the associated product identifier and tilting pattern.