Abstract: At current，the informatization level of coal production industry in China is lower，and the personnel for safety supervision has a heavy working load.These bring big difficulty in realizing the real-time supervision and management.In view of this issue，and based on the deep analysis of measures in safety for coal mines at home and abroad，the Internet of things and the Virtual reality are rationally jointed to develop a new system for real-time perceiving and pre-warming of coal mine safety.The variety of safety information can be obtained by the Internet of things.How to realize the integrated monitoring of safety information for the whole mine is an issue that should be resolved in time.The system makes full use of the multi-camera control characteristics of Unity 3D.3Dmax is adopted to build 3D virtual scene by modeling and rendering.With the aid of multithreading technology，the parameters updating of each sensor is achieved to realize the multi-widow integrated monitor of mine environment.The research indicates that this system can achieve the real-time monitoring of mine environment and device parameters for a coal mine，and also position and analyze the movement tracks of personnel underground. Coal mine safety|Multithreading|Multi-window|Synchronous monitoring|Unity3D