By using the semiconductor laser，the CCD display unit and a high precision solid axis angle sensor

to improve the traditional spectrometer，the adjustment of spectrometer laser self-collimation can be achieved，which makes the coarse adjustment of spectrometer purposefully and reduces the blind adjustment. The liquid crystal display of telescope images alleviates the experimenters visual fatigue and reduces the parallax. The digital reading system makes not only readings become very simple and fast，but also the repeatability and reliability of data become better.