Establishing an efficient and flexible production system is the most important part of the successful civil aircraft development program, and is also the key problem that the aircraft manufacturers must solve in the face of a changing market. The complexity and diversity of civil aircraft products determine the complexity and diversity of the production system. The System Engineering method makes it possible that the production system is designed in a topdown way based on requirements analysis. By fully studying the relationship between civil aircraft products and production system, and using for reference to the requirement definition methodology of new aircraft development, this paper studies the requirements definition process of production system, proposes a stakeholder model and a basic function model, introduces risk analysis into the requirement definition process to ensure the safety of the target production system, describes the capturing methods of the requirements both from stakeholder needs and from risk response needs, provides a classification method of production system requirements and discusses the purpose of doing that, gives a list of typical source for production requirements capturing, which can be used as a template in practice work.