An Optical fibre fransmission photoelectric direct spectrometer is constitued by dispersion system, spectral line detection system and signal amplification with treatment system. There is the route number in detection line same the measured element type as optical fibre, the dispersion system given spectral lines are transmitted respectively to the same photoelectric reeeptor, the expoure time of spectral line is controlled by the shutter, the measured elements and its contents are obtained by computercontrolled shutter and treated photoelectric direct reading spectrometer when the multirun photoelectric receptor is adopted, it's simple track photoelectric direct spectrometer when the simple track photoeleetric receptor and suitable addition of shutters are adopted.