Method and device for realizing user comments based on lineation as well as terminal device and system

The invention discloses a method and a device for realizing user comments based on lineation. The method comprises the steps of obtaining page content information displayed on the display screen of a terminal device and matched with a lineation comment function triggering operation upon monitoring the lineation comment function triggering operation, generating a user comment data search request and sending the request to a server based on the obtained page content information, popping up a user comment discussion box after receiving user comment data returned by the server as responding to the user comment data search request, and displaying the user comment data in the user comment discussion box. According to the method and device, users can communicate with each other on any contents in a whole book in real time in the reading process; deep discussion can be realized on read details, more reading fun can be discovered and the shortcomings of a traditional comment method are made up.