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我国LED产业发展非常迅速，稀土钇铝石榴石（YAG）系列荧光粉广泛应用于白光LED。德国InstrumentSystems公司的Spectr0320e光谱仪适合光谱的精确测量，文章结合Spectr0320e和远方公司的PE-5荧光粉激发装置，实现蓝光激发下黄色YAG荧光粉的色品坐标、相对亮度、量子效率等参数精确的测试，研究了仪器在不同的测试条件如暗电流、光电倍增管、密度滤光片等设置的不同，对测试结果的影响，并给出利用本装置测试荧光粉时应该注意的事项。“,”LED industry in china develops rapidly. Yttrium aluminitum garnet （YAG） phosphors are widely applied in white LEDs. The Instrument Systems company＇s Spectro320e spectrometer is suitable for accurate measurement of the spectrum. It is combined in this paper with the Everfine company＇s PE-5 phosphor excitation device to achieve the accurate testing of yellow YAG phosphors excited by blue light, such as chromaticity coordinates, relative brightness and quantum efficiency. We also studied the influence of different testing conditions on the results, such as dark current, PMT and density filter. The cautions are provided here when using the Spectro320e spectrometer.