According to the wide spectrum requirement of environmental pollution gases monitoring, a wide spectrum infrared spectrum remote sense method was proposed. By using the long wave infrared Fourier interference spectrum technology, the response band of the instrument was extended to the short wave end of the long wave infrared atmospheric window, so that it can detect the fingerprint characteristics of most common industrial gases under certain conditions. In the 7.0-14.5 μm (700-1 450 cm-1), the difference spectrum method and bright temperature method can be used to monitor a variety of commonly used industrial toxic and harmful gases, and the approximate concentration characterized by the long-term product of the concentration range can be given. The performance characterization method of remote sense spectrometer was introduced, and the application examples of PARES100 to 11 kinds of industrial gases and harmful gases were given.