Fourier transform imaging spectrometer is a new technic, and has beendeveloped very rapidly in nearly ten years. The data catched by Fourier transformimaging spectrometer is indirect data, can not be used by user, and need to beprocessed by various approaches, including data pretreatment, apodization, phasecorrection, FFT, and spectral radicalization calibration. No paper so far hasbeen found roundly to introduce this method. In the present paper, the authorwill give an effective method to process the interfering data to spectral data,and with this method we can obtain good result.processing究员