Since the quality of traditional Chinese medicine products are affected by raw material, machining and many other
factors, it is difficult for traditional Chinese medicine production process especially the extracting process to ensure the
steady and homogeneous quality. At the same time, there exist some quality control blind spots due to lacking on-line
quality detection means. But if infrared spectrum analysis technology was used in traditional Chinese medicine
production process on the basis of off-line analysis to real-time detect the quality of semi-manufactured goods and to be
assisted by advanced automatic control technique, the steady and homogeneous quality can be obtained. It can be seen
that the on-line detection of extracting process plays an important role in the development of Chinese patent medicines
industry. In this paper, the design and implement of a traditional Chinese medicine extracting process monitoring
experiment system which is based on PROFIBUS-DP field bus, OPC, and Internet technology is introduced. The system
integrates intelligence node which gathering data, superior sub-system which achieving figure configuration and remote
supervisory, during the process of traditional Chinese medicine production, monitors the temperature parameter, pressure
parameter, quality parameter etc. And it can be controlled by the remote nodes in the VPN (Visual Private Network).
Experiment and application do have proved that the system can reach the anticipation effect fully, and with the merits of
operational stability, real-time, reliable, convenient and simple manipulation and so on.