The SmokeStack Tele-Monitoring System (TMS) constantly measures air pollutants emitted by major industrial emitters through remote automatic sensing equipment. Automatic sensors installed in smokestacks continuously measure seven types of air pollutants (dust, SO2, NOx, NH3, HCl, HF, and CO) to produce data every 5 minutes and 30 minutes. The SmokeStack TMS was first installed in the special countermeasure area of the Ulsan-Onsan Industrial Complex, and as of the end of July 2014, it has been installed in 1,477 smokestacks of 569 major industrial emitters (Classes 1 to 3) nationwide. Construction of control centers to collect measurements began in 1998, and a total of four control centers have been completed in each region. The transmitted data is also used as administrative materials for emission charges and administrative dispositions.