Fourier transform spectrometry is a type of novel information obtaining technology, which integrated the functions of imaging and spectra, but the data that the instrument acquired is the interference data of the target, which is an intermediate data and couldn’t be used directly, so data processing must be adopted for the successful application of the interferometric data.In the present paper, data processing techniques are divided into two classes: general-purpose and special-type.First, the advance in universal interferometric data processing technique is introduced, then the special-type interferometric data extracting method and data processing technique is illustrated according to the classification of Fourier transform spectroscopy.Finally, the trends of interferogram data processing technique are discussed.