Abstract: Radiant coolers have been widely used for spaceborne because of their some advantages and properties such as long life,no vibration,no electromagnetic interference and negligible power consumption etc. that is very suitable for space application.As following the improvement of space project in the world,rapid development of the radiation cooling techniques has been obtained.By now,radiant coolers are still the practical and wide choice for space application among all cryogenic refrigerators,esp.for long flight missions.