Spectral band classification interferometer spectrometer and detection method thereof

The present invention relates to a spectral band classification interferometer spectrometer and a detection method thereof. The interferometer spectrometer comprises an interference system, a spectrum segmentation unit, a photodetector set and a data processing system; lights emitted from detection points pass through the interference system for forming two beams of coherent lights; the two beams of coherent lights pass through the spectrum segmentation unit to be divided into N different spectrum bands of two beams of the coherent beams, each spectrum band of the two beams of the coherent beams are collected by the photodetector set, and the photodetector set converts optical signals to electric signals; and the data processing system is connected with the photodetector set, and the spectral information of the detection points is recovered through adoption of the Fourier transform and spectrum band splicing. The spectral band classification interferometer spectrometer and the detection method thereof improve the accuracy of the recovering spectra, and is more suitable for detection of ultraviolet, visible light, near infrared and intermediate infrared spectrums of broadband spectrum bands compared to a traditional Fourier transform spectrometer.