The invention relates to a method and system for computer-aided manufacturing (2) of a three-dimensional part by a manufacturing device, and an associated method and system for complete or partial remanufacturing (4), using at least one predetermined manufacturing material, and implementing a set of manufacturing data. The manufacturing system (2) comprises modules (14, 18, 22, 6) configured to implement, during or at the end of the manufacturing of a three-dimensional part: a calculation of a piece of remanufacturing information associated with said three-dimensional part, and comprising or allowing access to the set of data for manufacturing said three-dimensional part, an inscription on the surface or in the body of said three-dimensional part, by a predetermined marking method, of a remanufacturing mark coding said remanufacturing information. The remanufacturing system comprises modules (32, 36, 40, 46, 48) configured to implement a reading of the remanufacturing mark, obtaining of a set of manufacturing data of the initial three-dimensional part and a complete or partial remanufacturing of a three-dimensional part mechanically identical to said initial three-dimensional part.