The invention discloses a ventilator monitoring system. The monitoring system comprises a main server, a mine flameproof and intrinsically safe programmable control box, a main fan and a dual fan connected to the mine flameproof and intrinsically safe programmable control box. Special switch for power fan, power supply switch for main fan, power supply switch, wind speed sensor and several gas sensors, flameproof and intrinsically safe programmable control box for mining is connected to the main server on the ground through underground ring network, power supply switch for main fan Connect with the dedicated switch for dual power fans. The invention can continuously monitor parameters such as fan air volume, on-off state, and air cylinder state on-line, and provides high-efficiency, stability, reliability, and real-time performance by controlling the start-stop of the motor of the rotary fan and remote graphic and text monitoring, communication, and self-inspection. Strong data collection, storage, management, analysis and other functions and control functions, realize unattended, and play a fan monitoring system with the effects of safety, staff reduction and energy saving.