An orthogonal state measuring device includes a measurement table and a CCD camera displacing in X, Y, and Z directions relative to the measurement table and measuring a work piece placed on the measurement table. The orthogonal state measuring device further includes a wide angle surveillance camera, a computer main body, and a display. The wide angle surveillance camera captures in one pass an image that is capable of configuring a bird's-eye image of the work piece, the bird's-eye image encompassing an entire field over which the CCD camera is capable of relative displacement. The computer main body generates the bird's-eye image based on the image and defines a position of the CCD camera on the bird's-eye image, then configures navigation maps in which the position of the CCD camera is composited on the bird's-eye image. The display displays the navigation maps.