Method and system and device for labeling and reminding content in webpage

The invention discloses a method for labeling and reminding a content in a webpage. A browser client of a mobile terminal presets reminded contents and display style and stores the reminded content and display style inside the mobile terminal. The method comprises: the content to be reminded of the mobile terminal obtains a source code of the webpage; the browser client of the mobile terminal searches the source code to obtain content waiting to be reminded, wherein the content waiting to be reminded is relative to the preset reminded content in semantics. The browser client of the mobile terminal labels and displays the content waiting to be reminded in the webpage by the adoption of a preset display style. The method for labeling and reminding contents in the webpage labels the content that users care for after the webpage is loaded completely and before the webpage is displayed to the users, and a preset special style is adopted to label and display a new content of the specified format, and therefore, the new content is much conspicuous, and the users can quickly recognize the new content when they browse the webpage, and user experience is strengthened and time is saved. The invention further discloses the system that can label and remind the content in the webpage, the browser client of the mobile terminal and a server.