Abstract: Main problems about application of existing coal mine safety monitoring and control system were pointed out, such as unstable sensor performance and power supply, poor anti-interference performance of transmission lines, different system technology level, incomplete standards and so on. Technology requirements of Technology schemes of upgrading of coal mine safety monitoring and control system(exposure draft) were analyzed about system functions, performances and communication interfaces. A design scheme of new coal mine safety monitoring and control system was proposed according to requirements of Technology schemes of upgrading of coal mine safety monitoring and control system(exposure draft). Key technologies of the new system were introduced in details including new digital sensing, multi-system data fusion, distributed/local event/remote control, electromagnetic compatibility, fault diagnosis, plug and play, resuming from broken point, etc.