Based on the data processing technologies of interferential spectrometer,a sort of real-time data processing system on chip of interferential imaging spectrometer was studied based on large capacitance and high speed field programmable gate array(FPGA) device.The system integrates both interferogram sampling and spectrum rebuilding on a single chip of FPGA and makes them being accomplished in real-time with advantages such as small cubage,fast speed and high reliability.It establishes a good technical foundation in the applications of imaging spectrometer on target detection and recognition in real-time.