Technology market is an important grasp for Beijing in the construction of National S&T Innovation Center. In order to monitor the function of Beijing Technology Market to National S&T Innovation Center scientifically, a monitoring system is constructed. Based on the data since 11th Five-Year, a empirical study has been conducted which objectively reflects the trend of development in the past ten years and explores the problems of Beijing Technology Market in supporting the construction of national S&T Innovation Center. It is showed that Beijing Technology Market is playing an increasingly important role in the construction of National S&T Innovation Center, but there still exist problems such as technology radiation to the surrounding areas is not enough and the driving force of key industries still needs to be strengthened. On the basis of the monitoring results, some suggestions are proposed.