“Digital Factory: Modeling Method Oriented Towards Planning and Design of Complex Manufacturing System and Organization of Production Process” is a project of international S&T cooperation between Tongji University and Germany. On the basis of introduction and absorption of foreign digital factory software and correlated technologies, this project has developed and successfully applied the Tongji digital factory planning and simulation system, which greatly helps lowering the threshold for domestic medium and small-sized enterprises to implement the digital factory system, popularizing the digital factory technology and improving the production system planning and core competitiveness of enterprises.