The utility model relates to a boiler flue gas official document wireless transmission device, including the infrared ray light source, cut the slide, the benchmark air chamber, measure the air chamber, the optical filtering air chamber, detect the air chamber, the sensor, MCU and wireless network connection ware, it sets up in the rear of infrared ray light source to cut the slide, the rear of cutting the slide is provided with the benchmark air chamber and measures the air chamber, it has gas sample import and gas sample export to measure the air chamber, the benchmark air chamber is equipped with the optical filtering air chamber with the rear of measuring the air chamber, the rear of optical filtering air chamber is equipped with the detection air chamber, it is linked together through communicating pipe for two parts and two parts along the partition of light path direction to detect the air chamber, sensor settings is on communicating pipe, MCU is connected to the sensor electricity, the wireless network connection ware is connected to the MCU electricity. The utility model discloses can carry out determination to the NOX in the boiler flue gas, SO2, CO and CO2 pollutant to with data wireless transmission to the remote analysis equipment on, can make the operator keep away from gaseous pollutants, and have the data storage function, unusual with the reply network.