Abstract: Aiming at the problems of low automation degree, inaccurate air volume adjustment, slow emergency response and others in the traditional ventilation system of Henggou Coal Mine, a layered and domain division intelligent ventilation system with fieldbus and Ethernet ring network as the backbone is constructed, and a closed-loop air network calculation technology of "measurement-calculation-correction" is proposed and achieved, which breaks through the bottleneck of the traditional ventilation system in terms of air volume allocation accuracy and response speed. The core technological breakthrough lies in the composite method of incremental PID and fuzzy control, which achieves a 98% compliance rate for end air volume and an air volume deviation MAE of 3.2% ≤5%, significantly improving the wind network adaptive calculation accuracy and system response speed. The application results show that this scheme not only improves system safety and economy, but also reduces annual electricity consumption by 20%, shortens the disposal time of gas overrun from 15 min to 6 min, reduces the arrival time for inverted ventilation/restricted ventilation from 15 min to 5 min, reduces unit ventilation electricity consumption from 16.1 kW·h/t to 12.9 kW·h/t, saves about 5.72 million yuan in electricity cost annually, and reduces labor cost by 438 000 yuan. Through intelligent transformation, the system achieves rapid response and efficient air volume regulation, achieving a comprehensive effect of energy saving, cost reduction, and safety improvement.