Due to the overload problem of the server, the Web server has become the bottleneck to implement the P2P QoS to some extent. It has become a big problem that how to implement the QoS control in the Web system. We describe a QoS control for Web system based on dynamic monitoring and parameters regulating. It enables web site operators to optimize the usage of their Web sites by prioritizing among requests from different classes of users and dynamically monitoring and tuning Web sites so that desired QoS levels are attained. Our approach uses heuristic tabu search algorithm to guide the search for the best combination of configuration parameters.