(How to make statistics, analysis and evaluation of network efficiency and behavior? How to limit non work network behaviors such as QQ chat and irrelevant website browsing during working hours? How to block P2P behaviors such as BT and eMule, and conduct flow control to improve network speed and bandwidth efficiency? How to prevent users from "actively" downloading viruses, Trojans and malware? How to prevent potential disclosure through email, MSN and other channels? How to avoid legal problems such as malicious posting and reactionary remarks, and have evidence when problems occur? The efficiency and security problems caused by these phenomena make the advantages of the network appear to be greatly reduced. How can we effectively monitor the behavior of intranet users? Reasonably allocate limited bandwidth to ensure the access speed of core businesses and core personnel? Effectively avoid legal risks It is an urgent problem faced by enterprises. Watcher Internet behavior and traffic management system came into being.)