Abstract: This paper consists of three parts. In part 1,the temperature mathematical models in-cluding cockpit,human body and ventilation suit are established.The composite mathematical model of the above three factors is also established.All of the above model are verified by tests,In part 2,based on the above mathematical models,the composite characteristic of cockpit air-conditioning system, ventilation suit and ground air-conditioning vehicle are investigated under-the condition of the same aircraft performance compensation loss,taking the comfort level of hu-man body as a comparative standard. In part 3, the results of this research are summarized

Key words: temperature control-mathematical models, complex systems, temperature distribution