The embodiment of the invention discloses a deformation monitoring method and apparatus for equipment in enclosed space. The deformation monitoring method for equipment in enclosed space includes thesteps: performing point cloud data acquisition on the equipment in the enclosed space regionally; for the point cloud data of the equipment in each region, after splicing and denosing, the point clouddata, matching the denoised point cloud data with each point cloud data model in a point cloud data model library so as to determine the first attribute information, of each equipment, represented bythe denoised point cloud data; saving the denoised point cloud data and the first attribute information in a correlated manner; and comparing the denoised point cloud data with the historical point cloud data correlated with the first attribute information to perform deformation analysis on each equipment. The deformation monitoring method and apparatus for equipment in the enclosed space realizes automatic inspection of the equipment in the enclosed space, improves the inspection efficiency of the equipment in the enclosed space, and reduces the probability that the inspection staff is in anunsafe environment, such as anoxia and ponding.