The aim of infrared scene built by computer is generating infrared image using the basic principle of infrared physics and computer technology in order to research and test the characteristics of infrared systems. Based on the infrared imaging simulation of typical scenes, researches about the thermal models and infrared images of the key components such as terrain, sky and cloud are researched. The main works include the composition and the detailed architecture of the scene, the method and steps of the components building. And the whole infrared scene is built. The atmospheric attenuation affecting infrared scene effect is analyzed. Simulation results are evaluated and analyzed to point out the characteristics of this method.