The distributed monitoring system is widely applied in detecting scattered objects in large engineering projects, of which the information system is the important component. In this paper, the information system is divided into external and internal. Internal information system is responsible for data collection and management, which is the framework design of the database server system. External information system uses the original monitoring data to calculate the monitoring target and presents the results to the user. In the internal information system, field server and data server are effectively connected by coordination server. External information system is divided into 7 levels according to the general distributed monitoring system's function, the specific function modules and the relationship among them are built aiming at the different monitoring systems. Finally, distributed monitoring information system model of subway tunnel subsidence is put forward based on the above-mentioned framework system, and this information system can also be applied to other distributed monitoring systems.