POCAS can be applied in the rotary table production process. The analysis algorithm implemented in POCAS can eliminate eccentric errors which are caused by installation, so that one angular geometric error and two linear geometric errors can be analyzed precisely, which the uncertainty is less than 0.8" and 3 µm respectively. The process of installation and measurement can be completed within 30 minutes.The positioning error(angle) is the most important kind of quality control for rotary table domestic manufacturers. Nowadays, the manufacturers use the laser interferometer to do this kind. This developing technique, a traceable angle standard, can directly be used in the production process. The setup and measurement of time can decrease within 30 minutes which is better than the normal measurement method.The rotary table is a key component of the five-axis machine tool. Recently, domestic manufacturers develop to the multi-axis machine tool. In the factory manufacturing end, this technique provides a crucial angle standard.