With the improvement of the performance of the supercomputer, the scale of the system becomes larger and larger, and how to monitor and manage the system efficiently becomes one of the key issues to be urgently solved for the high-performance computer. This paper proposed a monitoring and management system for the large-scale computer system called MMS (Monitoring and Management System). In MMS, the efficiency was improved by using the distributed system architecture, and the data processing was designed subtly to decrease the effect of the MMS on the computing network, which made the response time of the web client fast at the same time. The theoretical analyses and experiment results show that the MMS is efficient and reliable.