Abstract: An image measuring apparatus with an automated control of variable-power nose wheel rotation and 3D displacement includes a base on a work table on a floor, a platform on the base and having first and second moving parts for controlling the platform moving along X-axis and Y-axis respectively, an upright column on the base and a side of the platform and having a third moving part capable of moving along Z-axis, and a measuring lens group disposed on and displaced with the third moving part. The control device includes a control program for controlling the displacement of the first and second moving parts to change the position of the platform, controlling the displacement of the third moving part to change the position of the measuring lens group, and controlling the measuring lens group to switch to an objective microscope to a different magnification to achieve a fully automated measurement.