Based on the requirements of the vacuum system for the new aging tests of the space infrared device, this paper presents a design of a fully automatic high vacuum exhaust station with two sets of pumping system. One is the main vacuum system with a mechanical pump and a molecular pump as the backing pump and a sputter ion pump as the main pump; the other is the auxiliary vacuum system composed of a mechanical pump and a molecular pump, used for pre-pumping. With the computer control technology, this multi-station structure system enjoys automatic functions. The theoretical calculation analysis shows that this system can meet the vacuum requirements for the aging tests of the infrared device.