The invention discloses a material plan and material operation closed-loop management system. The closed-loop management system comprises a closed-loop management system platform; and the closed-loop management system platform consists of project material application, a supply plan uploading unit, a material classification list, a purchase enquiry unit, a technical parameter audit table, competitive negotiation, financial audit, a technical parameter check table, a contract signing and uploading unit, purchase payment application, material tracking, a material acceptance and operation system, reception application, a purchase return table, a periodic counting statistics table, and a warehouse material scrap statistics table; and information is mutually shared through a local area network. According to the system, dispersed work and different project data are integrated for resource sharing; and on the platform, the information such as a contract delivery date corresponding to a material, a project department demanded date, whether a supplier has difficulty in material supply or not, when the material is delivered under the reply of the supplier, whether the material arrives or not, and the like is clear at a glance, so that the cost is reduced and the working efficiency is improved.