There are five modules in this system that need to be tested and some submodules are selected from each main module to test them and ensure the normal operation of the system. In the system design process, some mistakes are inevitable. For the expression syntax error, it is prompted automatically when the program is running and its immediate correction is required, so this type of error is easier to find and fix. But another type of error is the result of an error caused by incorrect operation or a logic error in the formula for calculating certain data during program execution. This type of error is very hidden, sometimes it seems, sometimes it doesn't appear, so investigating this type of dynamic error takes a lot of time and work.