The reasonable design of human-machine-environment system is closely related to the automation and intelligence of industries. However, there is a lack of suitable analytical method and indicative solutions to the problems when the couplings of man, machine and environment fail to achieve the design. This paper compares the coupling as the Su-Field model, then the problems can be solved under the guidance of the standard solutions. Firstly, the set of constraint factors of the man, machine and environment are established respectively and the coupling between them are carried out. Secondly, the Su-Field model composed of people, machine and environment are established to analyze the problems in the coupling by analogy. Finally, under the guidance of the standard solutions, the problem are solved and the ideal coupling effects are realized. This method effectively solves the problem in the coupling of human, machine, environment and improves the rationality and effectiveness of the system design.