利用天空背景测量设备测量了西北戈壁地区的天空背景光谱亮度，对该地区典型时刻的背景光谱分布进行了研究；针对相应背景光谱下的滤波技术对光电系统探测能力的提高进行了仿真研究.研究结果表明：该地区的背景光谱分布相对于理论分布来说，600～900 nm光谱波段背景亮度所占的比重较大，且随着方位角、天顶角的改变光谱分布变化不大；在天空背景为10 W·m-2Sr-1条件下，在该地区采用600～900 nm滤波方式光电系统的探测能力只得到约0.1等星提高.

The sky background brightness has been measured with sky background brightness measurement equipment in desert region of northwest china, the spectrum distributing of background brightness of the region is researched, and the detecting ability of the Electro-Optical system is also researched and simulated through the filtering technology in the region under the spectrum distributing. The research results indicate that the background spectrum distributing is obvious different to the theory spectrum, the proportion of the 600～900 nm band is bigger relative to theory, and it varies slowly with the variety of azimuth angle and zenith angle. The detecting ability can only improve 0.1 magnitude through filtering technology when the background brightness is 10 W·m-2Sr-1.