Referring to the 1553B test equipment’s shortcoming, based on constructed the system frame, proposed modular design of the system software ideas. Described each modular’s function, introduced the design process. Analyzed the key techniques, such as Real-time data collection, avoid conflict response Etc. realized aviation ordnance 1553B bus monitor. The application results show that the technology to complete the mode selection, data transmission, programmable message interval, auto-retry, programmable interrupt function Etc, it can be expanded to monitor other 1553B systems after revised.