A dental CAD/CAM device capable of accurately forming a dental coating is provided. The device includes: an intraoral-site measurement section 100 configured to measure 3D shape data on an intraoral site 130 with an OCT probe 150 for obtaining a tomogram of an object using near-ultraviolet light； a treatment-target-tooth 3D shape data acquisition section 200 configured to acquire shape data of a treatment target tooth from 3D shape data obtained by the intraoral-site measurement section 100； and a coating object 3D shape data creation section 300 configured to create 3D shape data on a dental coating such that the dental coating matches the 3D shape data of the treatment target tooth obtained by the treatment target tooth 3D shape data acquisition section 200.
