A machine control device includes: an imaging control unit that controls the imaging device to capture two images at two different imaging positions; an imaging position information acquiring unit that acquires positional information of the two imaging positions; a measurement distance restoring unit that restores a measurement distance of the object based on two images, distance information between two imaging positions, and a parameter of the imaging device by using a stereo camera method; and a predetermined precision position calculating unit that calculates distance information between the two imaging positions at which the measurement precision of the object satisfies a predetermined precision based on the two images, the measurement distance of the object, and the parameter of the imaging device, in which the machine control device controls the position and orientation of the imaging device based on the distance information between the two imaging positions, and changes two imaging positions.