The next generation resource monitoring system in distributed computing environments should not only accurately monitor the environment but also automatically reconfigure the environment. In this paper, we present INAPmon, a robust and scalable policy-based resource monitoring system in a multiserver network computer environment. It monitors the resource usage with sensors and aggregates the data in servers for reconfiguring the environment, which aims to guarantee load balance between servers and impartiality between users. This policy-based approach indeed provides a novel perspective for the design of future resource monitoring system.