The invention relates to a workshop production plan scheduling system and method oriented to discrete manufacturing. The system comprises a workshop plan scheduling system arranged in a workshop, wherein the workshop plan scheduling system is connected with manufacturing units used for finishing a work order plan, an ability group units and other equipment, and the manufacturing units, the ability group units and other equipment are arranged in the workshop; the workshop plan scheduling system is also connected with a warehouse system, an ERP (Enterprise Resource Planning) or MRP (Manufacturing Resource Planning) system, a human resource system and a process system; the ERP or MRP system is connected with the workshop plan scheduling system through an interaction module; and the interaction module is used for issuing a production plan and reporting a workshop production plan finishing situation in real time. By use of the system, production factors, including an equipment load, an equipment calendar, a process flow, a manufacturing beat, a work order transferring way and the like, are comprehensively considered, a practical production task is split into each executable work order, the manufacturing time and the manufacturing amount of each work order are set for each work order, an enterprise manager can be more favorably assisted in tracking and monitoring a whole production process, and meanwhile, the convenience and the maneuverability of production dispatching and scheduling are both given consideration.