WIP line side library management system. The system carries out information management and control on the production of products in the workshop, and exchanges data with MES, MDS, ERP, and WMS systems through standard interfaces and protocols to realize on-demand production and instant delivery, and achieve inventory control of the workshop line side warehouse. Order materials, work orders for finished and semi-finished products into the warehouse. It can effectively control the logistics efficiency of the production workshop, reduce the inventory level of semi-finished products, adjust the balance between the production organizations and production links between each workshop and each process, and reasonably control the storage of semi-finished products and semi-finished products, and do a good job in storage to ensure Product quality, save working capital, shorten production cycle, reduce and avoid backlog.