According to the general concepts and characteristics of the system we have introduced, as well as the role and characteristics of logistics in the overview of logistics, it can be seen that logistics activities must be studied with systematic theories and methods in order to better play the role of logistics in the national economy and realize the macroeconomic and microeconomic benefits of logistics activities. Logistics system is composed of various elements of logistics. There is an organic connection between the elements and has a comprehensive function of rationalizing logistics as a whole. Logistics system is a subsystem or component part of the social and economic system. More specifically, the logistics system refers to a certain time and space, by the need to operate the logistics products, packaging equipment, loading and unloading machinery, transportation tools, storage facilities, transportation roads, circulation processing and waste recycling facilities and other materials, energy, personnel and communication network (information) composed of several dynamic elements of interaction, interdependence and restriction, with packaging, loading and unloading handling, transportation, storage, circulation processing, waste recycling, and information collection, processing, sorting and other functions of the organic whole, and in the entire national economic system environment. 2. The model of the logistics system In the field of circulation, the logistics process can be regarded as a process system of interaction and interdependence of various logistics elements from production through circulation to consumption. In the field of production, the logistics process is a continuous input of raw materials, machinery and equipment, labor, after processing, output to meet the needs of society investment and output system; in terms of each link of the logistics process, it is also an investment and output system. Each link must absorb certain energy, resources (people, money, things) from the external environment, and invest people in the form of losers. After conversion processing, directly or indirectly produce certain products or services, and then provide them to the outside world in the form of output to meet certain social needs. Therefore, the logistics system is still a continuous input from the environment, through conversion processing, continuous output of products or labor cycle process, which is the basic model of the logistics system.