WI-FI is currently a popular wireless LAN technology, with access to high speed, large coverage area and so on. WI-FI has its flexibility and mobility, more and more attention, showing great prospects. This article describes the characteristics and advantages of WI-FI technology, combined with the actual situation of a WI-FI based wireless sensor technology and monitoring system for the implementation of the mine ventilation plan, and the program specific application in the monitoring system has been described, the program has proved flexible, simple wiring, has certain application value.