Abstract: A temperature control system for a new space simulator in China is introduced.Its design philosophy is very advanced and novel.On the closed temperature controlled surface of the chamber,which is 2 3m diameter and 2m long,any steady temperature controlled from 0 to 50℃ and transient temperature controlled as sine wave,trapezoid wave and triangle wave in 90 minutes are realized.The temperature deviation in whole surface is less than 0 3℃,much lower than the expected.