Abstract: This paper briefly describes the theoretical basis for the development of stope roof disaster early warning technology,summarizes three types of real-time monitoring and early warning systems,including the over-front section,stope support and goaf. It systematically reviews the station deployment and early warning principles of various online monitoring and early warning systems,such as rockbolt support mine pressure in roadway, borehole stress, electromagnetic radiation, micro - current,microseism / ground sound,stope support resistance,and goaf wind pressure,etc. On this basis,this paper points out the shortcomings of the current real-time monitoring and early warning system of coal mine stope roof,and prospects the further fusion development and systematic application of the real-time monitoring and early warning system of stope roof:multi-source information fusion and early warning of stope roof disaster based on various online monitoring systems, and systematic management of mine disaster early warning system. Through comprehensive analysis of the technical status of various online monitoring and early warning systems,this paper points out the direction for the further development of the real - time early warning system of stope roof disasters.