In order to achieve a method in logistic function processing based on computer software, the paper discussed the principle and feasibility of using a VIdecoder as scanning logical operation unit to processing multiinput&outpt logistic function, and designed the application system based on LabVIEW, experiment shows that the system has the characteristic of independence on the number of variables and functions,universal and easeofuse,can be connected for data communication, and used in domain of simulation and actual measurement.