Abstract: In order to achieve effective management, data backup and analysis for excavation monitoring and to provide normalized data results, project management and targeted forecast and early warning analysis for excavation projects, a set of monitoring data processing system is developed by using the object-oriented programming language C # and modern database storage technology SQL Server 2005 and combining excavation engineering expertise. The system enables the measurement data to manage and query according to project category, and the data analysis is more convenient and clearly. The system is easier to use, and its forecast and early warning better conform to the actual results. The monitoring tools used for the excavation monitoring are basically corvered. The results more beautiful and specific. The proposed system improves the monitoring standardization and accuracy as well as the technological level and professional standards of excavation monitoring.