Abstract: With the bulk and scale production of spacecraft and the accelerated process of the new model development, the spacecraft vacuum thermal tests are required in more and more diverse conditions. For example, the temperature measurement and control is becoming more and more complicated. and the existing system gradually shows its inherent inadequacy. This paper focuses on the measurement and control electrical system, based on the united modeling language (UML) analysis and a system model is proposed to increase the information processing capability of the test equip ment, to enhance the system design human-computer interaction level, and thus to improve the state tracking functions during the test. It is demonstrated through the actual case application that the reliability of the test is enhanced by the electric model.