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蒙特卡罗法结合区域分解算法，求地物目标温度场和红外辐射出射度场．将三维复杂几何形体分解为若干个规则的子区域，不同的子域选用不同的坐标系，用控制容积法分别处理；整体结构用热网络法．用蒙特卡罗法计算辐射传递系数，可考虑界面的复杂辐射特性．引入辐射传递系数，分离了计算的难点，并可对波段并行处理．在空间域（计算区域）上将目标分解为若干个子域，也可使用多个处理器并行计算．
Monte-Carlo method combined with the regional decomposition algorithm, find the target temperature field and infrared radiation output field. The three-dimensional complex geometry is decomposed into a number of regular sub-regions. Different sub-regions adopt different coordinate systems and are respectively treated by control volume method. The overall structure is represented by the hot network method. Monte Carlo method to calculate the radiation transfer coefficient, the interface can be considered complex radiation characteristics. The introduction of radiation transfer coefficient, the separation of the computational difficulties, and parallel processing of the band. In the spatial domain (computing area) on the target into several sub-domain, you can also use multiple processors parallel computing.