Abstract: A series of interferometric images were acquired by pushbroom in the image plane interferometric hyperspectral technology, where the fringe pattern of every point was extracted and the spectrum was reconstructed by Fourier transform. Compared with the traditional interference imaging spectrometer, it had the advantages of high flux, high spectral resolution, high target resolution and so on. The basic principle of imaging plane interference spectrometer was introduced and a new push-broom method was presented. The petreatment such as apodization and DC removal are researched. Then the phase error correction methods were discussed, so as their advantages and disadvantages. A Sagnac image plane interference spectrometer was set up, and the spectral curve of the measured light was got.