In a multi-product mass production environment such as a body assembly process, it inspects a degree of assembly quality and measures gaps & flushes between semi-finished products mainly assembled with master panel (Door, Hood, T / Lid, T / Gate, Roof, Fender, etc.).It is a system that applies to assembly automatic installation to feed back to robot by 6 degree of freedom value (X, Y, Z, Rx, Ry, Rz) with the result of measurement.