Method of identifying flange specification based on augmented reality interface

A method of identifying a flange specification based on an augmented reality interface includes steps of: providing a first interface through which an operator selects real-time images of a flange at different viewing angles, and establishing a virtual flange surface according to the real-time images; providing a second interface, through which the operator selects three circumferential points corresponding to the flange and establishing a virtual flange model having a virtual outer diameter; providing a third interface, through which the operator adjust a virtual pitch circle diameter of the virtual flange model; providing a fourth interface, through which the operator adjust a virtual thickness of the virtual flange model; providing a fifth interface through which the operator inputs a count of bolts; and looking up a database according to the virtual outer diameter, the virtual pitch circle diameter and the virtual thickness to obtain searched results.