Firstly, the method of IR image generation by computer is reviewed. Then the specific simulation methods of simulating the target, the background, the atmospheric effect and the sensor effect are analyzed and compared, and the limitations are discussed. The advanced technologies of dynamic IR scene realization are introduced, such as the suspended and membrane resister technology and the laser diode technology. The developing tendency of dynamic IR scene realization is pointed out. Finally, the developing trend of the technique is expected.