The CES Innovation Award-winning Smart Early Warning System for Predicting Slope Failure is composed of a smart displacement sensor, an IoT sensor node, and a gateway that features patented micro-displacement measurement technology with 0.01mm accuracy in detecting slope deformation. The system uses a predetermined automatic collapse risk prediction algorithm that triggers an alarm when the threshold for displacement velocity is reached. The IoT sensor-based Smart Warning System for Predicting Slope Failure provides measurements to a centralized server for quick data analysis and issues real-time notifications to keep users (or administrators) informed and prepared.