Abstract: A processing and analysis system of dam monitoring data is developed according to the requirement of current reservoirs and dams safety monitoring. The universal mathematical analytical model and processing template of the monitoring data are established. Through modern information technology, the automatic processing and analysis of the new system is realized, such as automatic rejection of gross error, statistical analysis of characteristic value, drawing of various spatial and temporal distribution graphs, quantitative analysis. The system could generate the corresponding yearly, seasonal and monthly processing reports and output the reports in Word form, which reduced the workload of reservoir management staff and improved quality and normalization level of monitoring data processing.