Abstract: To improve the level of railway structure gauge measurement and management and facilitate the information-based flow of gauge measurement data, this paper designed and developed an auxiliary measurement and application system for railway construction gauge, and elaborated on its system architecture and core functions. This system adopted multi-source perception-driven equipment identification and information synchronization technology, as well as native Android development technology for mobile terminals. It implemented the integration of gauge data collection, processing, intrusion detection, statistical analysis, and application. Field application results show that the system makes up for the shortcomings of traditional measurement methods, significantly improves the efficiency and accuracy of gauge measurement, and provides strong support for the digital flow throughout the entire measurement process.