(Panabit application layer traffic analysis and control system (hereinafter referred to as panabit flow control) is a new generation of application layer QoS product born under the background of the wide popularity of Internet P2P (peer-to-peer) applications. Panabit flow control is an application level flow control product in a real sense. Based on the connection process and protocol feature identification, it adopts an active detection engine for the encryption protocol. After a complete identification process, it can accurately identify applications and accurately locate specific software clients, so as to improve the application visualization and manageability of broadband networks to a new stage. Panabit flow control system can help broadband operation network managers understand the network application flow status and application overview in real time, conduct flexible and controllable flow management through strategies, and improve network operation efficiency.)