Abstract: When the temperature in the laboratory changes,there is very real possibility that components of spacecraft can't work well in the thermal experiment.Through the theoretical thermal calculation of key components of the product for the transfer product,and thermal design of the temperature control material and heating pieces were designed,then PID thermal control was achieved to meet the intelligent thermal control of key components of the products in the experiment under atmospheric pressure and high/low temperature.This Optimal design of intelligent temperature control module can meet the accuracy requirements of components of spacecraft.This article also introduces the successful applications of intelligent thermal control technology in the experiment under atmospheric pressure and high/low temperature for components of spacecraft,and has a strong reference and guidance for subsequent model experiments.