Abstract: Rockfall disasters, marked by wide distribution, high frequency and sudden occurrence, constitute one of the most challenging disasters for monitoring and warning among the three major geological disasters. Currently, the monitoring approach based on macro displacement proves to be highly challenging in meeting the requirements for early warning of hazardous rock collapses. A novel slope dynamics theory founded on Newton's second law and a new micro-core intelligent monitoring technology are presented, and a new safety situation earth-world sensing monitoring and early warning system based on "technology + management" is developed. This paper undertakes a summary and discussion in five respects: the dynamic model of dangerous rock collapse and instability, the monitoring and early warning index, the sensing equipment, the early warning system, and the engineering application. Firstly, transcending the traditional limit equilibrium theory, a dynamic theory of dangerous rock slope based on Newton's second law is put forward, and a generalized instability model of dangerous rock relying on the variation of dynamic characteristics is established to shape a set of evaluation theory that can mirror the detachment level of dangerous rock. Furthermore, the micro-core sensing equipment for sensing the "trinity" index during the real-time of dangerous rock collapse and the early warning platform of the "trinity" warning method are independently developed, and the idea of preventing dangerous rock collapse disasters by combining technical monitoring and engineering management is proposed. Finally, the system has been implemented in 500 engineering projects nationwide, and has successfully alerted more than 50 hazardous disasters, resolving the scientific issue of early warning of dangerous rock collapses.