Abstract: With the booming development of the China’s space industry, the spacecraft vacuum thermal test with high efficiency becomes an urgent task. A fast and universal measuring and controlling software is required. The unified modeling language (UML) is an important software development methodology in the object-oriented applications. One may enhance the efficiency of software development by using UML to construct models for the software system. This paper discusses the software architecture, and how to analyze and design the measurement and control software with UML and Rational Rose.