Abstract: Construction process monitoring is of great significance to the construction of complex large-span spatial steel structures. The targeted monitoring indicators should be chosen according to different construction methods specifically. The commonly-used monitoring indicators and the corresponding monitoring methods and devices during the process of the construction monitoring of large-span spatial steel structures, and new monitoring technologies are discussed in detail. Based on the construction process of the steel roof of the Beijing New Airport terminal building, the monitoring indicators including the stress and strain of key components, structural displacement and deformation by using 3D laser scanning and UAV monitoring of priority areas are selected comprehensively to inspect the mechanical behavior, deformation feature and partial construction quality problems of the structure. This comprehensive monitoring technology provides a comprehensive and reliable solution to the construction monitoring of complex large-span spatial steel structures.