Abstract: The first and second generation thermal imaging systems static performances were investigated and the performances predicting software was developed. Combining with modern program devising idea, a software development way was introduced which considered data as the center, achieved the independence of modules by using the dynamic link library, and ultimately isolated the data from the application program. In Windows environment, by using VC6 0 software development platform, the thermal imaging systems static performance predicting software CFLIR 2 0 was developed. It is convenient to use the software, and the computing results accord with the actual data. Compared to the former software SPTIS, CFLIR 2 0 is a window's program. The software is perfected for including the second generation's performance model.