Abstract: Water inrush forecast is the key to realize safe mining and reduce the loss caused by water hazards. Through the analysis of research and development situation of mine water inrush monitoring and warning system, and in combination with the monitoring examples, the authors proposed the key technologies for the selection of monitoring parameters, the stability and precision of monitoring equipments, the choices of monitoring site and drilling layout and warning threshold and alarm, then, the thinking of how to optimize and perfect the system was given.