The invention discloses an adaptive and extended intelligent monitoring and early warning system for slope stability, which includes a geographic information collection module, a three-dimensional modeling module, a scheme selection module, a data collection module, a statistical analysis module, and an early warning module. The geographic information collection module is used for collecting The geographic location information of the monitoring area c is used to generate a GIS data model. The 3D modeling module is used to generate a 3D model of the monitoring area based on the pictures in the monitoring area. The three-dimensional model of the area determines the slope type, landslide risk, and determines the monitoring point, monitoring plan, and early warning plan. The data acquisition module is arranged at the monitoring point to collect the monitoring data of the monitoring point. The statistical analysis module is used to process the monitoring data based on the monitoring data. Generate various statistical data, and the early warning module determines the early warning model, early warning level, and disposal plan based on the monitoring data and statistical data. The invention can effectively reduce risks such as landslides.