An image processing device adjusts an imaging direction and an imaging magnification by performing driving control of an imaging device for each image processing process and sets an imaging position of a measurement target. The image processing device calculates an evaluation value of set feature parts in a captured image input at the time of measurement on the basis of captured image data and compares the evaluation value with determination conditions. If the determination condition is satisfied, the image processing device performs predetermined image processing and outputs a result of the image processing to a control device.