The method of an aircraft skin infrared radiation imaging is proposed．First,the geometric model of the aircraft skin is built up with a grid.Temperature distribution of the aircraft skin is obtained by solving the control equations.Second,the aircraft skin infrared radiation data is transferred from three-dimensional to two-dimensional by element projections according to the ordering of their depth.The images of the temperature distribution are generated at various angles so that the radiance of aircraft skin can be calculated and normalized.Finally,the aircraft skin infrared radiance is described as a grey image.The experimental results have shown that the method is simple and practical and it provides an effective representation for the study on infrared distributions of the aircraft skin.