The theory and experiment method to measure the detonation temperature by means of CIS are studied.A new type system,transient multi-wavelength detonation temperature measuring system,which is reasonable to practical measuring equipment,is presented.The system is calibrated by measuring the standard spectrum of the laser.Combined with multi-wavelength color temperature regression analysis arithmetic,the system is able to measure the temperature of fast varying halide tungsten light and its temperature varying curve with time.