Abstract: A hyperspectral reconnaissance system combining image with spectrum is discussed,based on concave grating and BTCCD,an UV/VIS/NIR broadband hyperspectral system(HIS) is constructed.After tradeoff among the geometrical optical parameters(FOV、blur spot、pixel pitch、F etc.)and physical optical parameters(bandwidth,waveband,spectral resolution etc).Optical design for the given system is discussed.From tests and experiments,an image having a blur spot less than 2pixel is obtained and the capability of detecting a camouflage object is verified at last,providing a new way in battlefield reconnaissance and auto target recognition.