红外ＣＡＴ即红外计算机辅助透视，它是一项把红外测温技术与解热传导反问题结合起来的高新技术．本文首次建立了三维圆柱体系热传导反问题的求解方法，推导出了内表面温度一定情况下的红外ＣＡＴ解法．最后，用数值实验验证了解法的正确性和可行性 Infrared CAT infrared computer-assisted fluoroscopy, it is a combination of infrared temperature measurement technology and antipyretic conduction problems of high technology. For the first time, this paper established a solution to the inverse problem of heat conduction in a three-dimensional cylindrical system and deduced the infrared CAT method under the certain temperature of the inner surface. Finally, the correctness and feasibility of the method are verified by numerical experiments