The present invention provides a device for sharing application session information across multiple channels, for managing the communication between terminal devices and a web server, said device comprises an application session manager (ASM) connected between the terminal device and the web server for receiving and forwarding said user's request sent from said terminal device and the response returned from the web sever; a storing device connected to the application session manager, for storing application session management information and application session information in the response returned from the web server; a retrieving device, connected to the application session manager; an intercepting device, connected to the application session manager, for intercepting a new application session information in the response from the web server; said application session manager generates an application session management information (ASMC) of said user, then sends said response to said terminal device which has sent said user's request.