According to the general concepts and characteristics of the system we introduced, as well as the role and characteristics of logistics in the logistics overview, it can be seen that it is necessary to study logistics activities with systematic theories and methods in order to better play the role of logistics in the national economy and achieve the macroeconomic and microeconomic benefits of logistics activities.

The logistics system is composed of various elements of logistics, and there is an organic connection between the elements and a complex that has the function of rationalizing the overall logistics. The logistics system is a subsystem or component of the social and economic system. Specifically, the logistics system refers to a dynamic element that interacts, depends on and constrains the logistics products, packaging equipment, loading and unloading machinery, transportation tools, storage facilities, transportation roads, circulation processing and waste recycling facilities, etc. in a certain time and space. It is composed of several interacting, interdependent and constrained dynamic elements, energy, personnel and communication networks (intelligence information), and has the functions of packaging, loading and unloading, transportation, storage and preservation, circulation processing, waste recycling, and the collection, processing and sorting of intelligence information, and is in the environment of the entire national economic system.

2. Model of logistics system

In the circulation field, the logistics process can be regarded as a process system in which various logistics elements interact and depend on each other from production to circulation to consumption. In the production field, the logistics process is an input-output system that continuously inputs raw materials, machinery and equipment, and labor, and after processing, outputs to meet social needs; as for each link of the logistics process, it is also an input-output system. Each link must absorb a certain amount of energy and resources (people, money, and materials) from the external environment, and input them in the form of input. After conversion, it directly or indirectly produces certain products or services, and then provides them to the outside world in the form of output to meet certain social needs.

Therefore, the logistics system is still a cyclic process of continuously inputting elements from the environment, and after conversion, it continuously outputs products or services. This is the basic model of the logistics system.

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