Abstract: A procurement data management system to judge environmental suitability of portions in design stages and product recycling. In this system, data of purchased items used in products, parts, and materials or chemical substances of purchased items are registered. A purchased item database manages registered data in a hierarchical relationship of purchased items, component parts of each purchased item, component materials of each part, and contained chemical substances of each material. An environmental standard database manages environmental standard data for chemical substances. The system utilizes the hierarchical relationship among purchased items between chemical substances to extract parts unsuitable for environmental standards among the parts in each product.