Logistics logistics system is composed of various elements, there is an organic link between the elements and has the overall rationalization of logistics functions of the complex. Logistics system is a socio-economic system, subsystem or component. Logistics systems and general systems, with input, conversion and output three functions, through the input and output of the system to be exchanged with the social environment, the system and the environment dependent and survival, and the conversion is characteristic of this system with the system functions. The logistics system is an objective reality, but has not been recognized, and thus failed to dynamically utilize the advantages of the system. Logistics system is a large-span system, which is reflected in two aspects, one is a large geographical span, and second time span. Because logistics system less stable and highly dynamic. Intermediate level logistics system is a system-wide and are inherently separability, can be broken down into a number of sub-systems. Taicang logistics company tells you the complexity of the logistics system structural elements of the system there is very strong "back counter" phenomenon, often referred to as "alternate profit" or "benefit back against" phenomenon, the slightest mistake will occur when handling the overall system worse results.