多光谱摄影技术在文物保护与科技考古领域的成熟应用，为壁画现状调查提供了全新的技术手段，有助于全面厘清壁画原始样貌，拓宽壁画研究视域，充实相关研究的资料来源。本文重点阐述了多光谱摄影在莫高窟第 31 窟主室北壁《报恩经变》壁画调查中的应用原理、设备构架、拍摄方法及实践效果。

The mature application of multispectral imaging technology in the fields of cultural heritage conservation 
and scientific archaeology has provided a novel technical approach for investigating the current condition of murals. This method facilitates a more comprehensive understanding of the original state of murals, broadens the scope of mural studies, and enriches the sources of related research materials. This paper focuses on the application of multispectral imaging in the investigation of the Transformation Tableau of the Sutra of Repaying Kindness on the north wall of the main chamber of Cave 31 at the Mogao Grottoes. It systematically discusses the underlying principles, equipment configuration, imaging methodology, and practical effects of this approach.