The machine vision is a new emerging technology that machine simulates human visual to measure various parameters of the measured workpiece, which has fast speed and simple structure. By capturing images using area array CCD sensor and combining with corresponding plane calibration algorithm, plane size of workpiece can be measured. This measuring method is fast, but the accuracy is relatively low. On the contrary, high precision laser sensor has high accuracy but low speed. By combining respective advantages of the two sensors, a measurement method was proposed which had characteristics of high speed and high precision. And it was used in manufacturing, processing, detection and measurement of precision bearing.