针对红外目标的温度场和红外辐射通量的计算进行了研究。首先，研究了一般情况下的背景辐射，将背景辐射区分为三个部分，两种状态，分别予以讨论；随后，建立了几种简单形状物体的理论模型，利用这几种简单的模型，综合成复杂形状目标的模型，进而求解复杂形状物体的表面温度场；最后，给出了目标红外辐射通量的计算方法，并计算了某目标表面在两种情况下的温度。 The calculation of the temperature field and the infrared radiation flux of the infrared target was studied. First of all, we study the background radiation under normal circumstances, and divide the background radiation into three parts and two states, which are discussed separately. Then, several theoretical models of simple shape objects are established. By using these simple models, Into the model of the complex shape target, and then solve the surface temperature field of the complex shape object. Finally, the calculation method of the target infrared radiation flux is given and the temperature of a target surface in both cases is calculated.