The invention relates to a WEB browsing device which has the user communication capability and information sharing and information aggregation capability at the same time, and an operation method used for the browser, relating to the field of computer WEB browser. The WEB browsing device comprises a server terminal and a browser client; wherein, the server terminal comprises an authentication server, a database server, a subject server, a sharing server and a WEB server; the browser client comprises a user interface module, an information display module, a subject information mining module, an information aggregation module, a user logging module, a user registering module, an instant message input / output module, a view sharing module, a file download manager, a network protocol processing module, a typesetting engine module, a plug-in management module and a network data transmission module. The WEB browsing device has the information sharing and aggregating capability, and makes up the shortages of the existing proposal in the Internet service mode.