The invention provides a production scheduling method and system. The production scheduling method includes the steps: acquiring an assembling technology parameter and a practical production constraint parameter of a current production assembling task; according to the assembling technology parameter and the practical production constraint parameter, and according to a preset scheduling problem model, acquiring a process execution timetable and a resource utilization timetable for the current production assembling task, wherein the scheduling problem model includes a scheduling target of minimum time of completion, station execution constraint, station kind constraint, requirement for time of completion, process priority constraint and resource utilization constraint; and according to the process execution timetable and the resource utilization timetable, generating the assembling scheduling information. The production scheduling method and system can effectively solve the problem that complicated products are difficult in discrete assembling, can satisfy the complicated scheduling of a discrete assembling workshop, and can effectively improve the production efficiency of the discrete assembling workshop.