The present disclosure relates to a joint surface safety evaluation apparatus and, more particularly, to a joint surface safety evaluation apparatus for generating mesh data consisting of a combination of a plurality of polygonal mesh surfaces, based on stereo image data generated by photographing an evaluation target surface, generating modeling data by overlapping the stereo image data and the mesh data, extracting a mesh surface corresponding to a rock slope surface by applying the modeling data to a learning model, and calculating a joint surface evaluation score regarding the evaluation target surface, by using a normal vector for each of a plurality of extracted mesh surfaces.