The invention discloses a mail content loading method and apparatus, and a browser. The method comprises: a browser mail box plug-in, according to the user name and password of a mail box, sending a registration request to a mail box server side, and obtaining the registration identification of a mail box server; according to the registration identification, regularly checking the state information of the mail box, and performing prompting in the popup window page of the browser mail box plug-in; according to the state information of the mail box, obtaining the webpage format data of a mail in the mail box from the mail box server; and extracting the mail content messages of the webpage format data by use of the webpage format data at a browser side, and displaying the messages in the popup window page of the browser mail box plug-in in association with the mail in the mail box. By using the method, the apparatus and the browser, the mail contents of multiple mail boxes can be simultaneously loaded, the problem that a user has to afresh multiple mail box pages actively is avoided, the operation is convenient and fast, and the mail box management efficiency is substantially improved.