1. An industrial machine, comprising an industrial machine main unit, a construction working implement installed on said industrial machine main unit, two cameras each mounted at a known position with respect to a machine center of said industrial machine main unit, at least three targets being installed on said working implement so that the targets are within visual field of each of said two cameras, wherein one of said targets comprises a GPS device, said GPS device adapted to determine a coordinate position, and an arithmetic processing device for extracting images of at least three targets in common to the images from stereo-images taken by said two cameras, for obtaining a three-dimensional position of each target, for calculating a position and a posture of said working implement with respect to the industrial machine main unit based on the three-dimensional position obtained and said coordinate position of said GPS device, and for controlling said working implement based on said position and posture.