Abstract: Hyperspectral images are widely concerned due to their high spectral resolution.Their application is a task of top priority after solving the problems of radiance correction and calibration.The study on the hyperspectral image classification is valuable to crop growth monitoring,mineral identification and seawater analysis as well as many other useful aspects.In view of this,the development of imaging spectral technique is summarized and for the first time the classification methods are divided into two kinds:pure pixel and mixed pixel,according to the constitutions of a pixel.The object of induction and ana- lysis on the state-of-arts of hyperspectral image classification technique is expected to find breakthrough points and to strengthen our study on them.