为获取更精细的背景辐亮度分布信息，提出基于光纤光谱仪和二维转台对全天空背景光谱辐射进行测量的方法。可实现定点观测及全天空扫描两种工作方式。详细介绍了测量原理、系统的组成、定标的原理及方法等。经过一次全天空扫描可获得649个光谱辐射亮度采样样本，每个样本的光谱分辨率为0.5 nm。各个样本测量位置作为像素点，相应位置上各波段的辐亮度值作为灰度值，可得到各波段的全天空背景光谱辐射分布图。该方法为之后的科学研究提供了更详细的信息。

In order to obtain the detailed distribution information of background radial brightness, the measuring method of ground-based whole sky background radiance spectra is developed based on the fiber optical spectrometer and two-dimensional turntable. It can realize the fixed point observation and scanning all the sky. Structure of system, scheme of data detection, principle and method of calibration are introduced in detail. After one scanning, 649 samples of radiance can be obtained. Spectral resolution of each sample is 0.5 nm. Measuring position of each sample is used as pixel and each wavelength radiance of the position is used as gray level. The distribution of whole sky background radiation spectrum band is obtained. The proposed method provides more detailed information for further scientific research.