In modern manufacturing, the industrial robot how can accurately and quickly grab and put the workpiece is an important problem in the automated production, and the key is to accurately obtain workpiece information of position and attitude. Aimed at this problem, as image recognition, processing and visual positioning of the main research content, a simple processing and calculating accurately monocular vision positioning system was designed. This system was contained of the static image acquisition platform, image measuring module and the monocular localization algorithm and attitude measurement algorithm of three-dimensional (3-D) space to match. Through testing experiments, and analyzing of data and error, the system satisfies the requirements from workpiece spatial orientation and attitude measurement in the process of automation production.