According to the development status of infrared scene generation technology and the technology of true infrared images simulated by infrared scene generator, an laboratory testing system to prove performances of infrared imaging equipments is designed. Structures and operation principles are analyzed. Virtual environ. ment simulation units are designed by MultiGen Creator simulation tool and operation flows are given. An infra. red scene generator with DMD digital micro-mirror array structure is confirmed based on the analysis on technol. ogy levels and application states of infrared scene generators.