The embodiment of the application discloses an E-mail extraction method. The method comprises the following steps that: a proxy server logs in a mailbox server with the authorization information of a user; the mailbox server authenticates the authorization information, and keeps the proxy server in a logging status; the proxy server sends a search request to the mailbox server; the mailbox server searches for a specified E-mail according to the search request, and transmits information of the specified E-mail to the proxy server; the proxy server downloads and saves the specified E-mail according to the information of the specified E-mail; and the proxy server transmits the saved specified E-mail to the user. Through adoption of the E-mail extraction method, the proxy server can automatically log in mailboxes authorized by the user, and extract specified E-mails in a plurality of mailboxes according to the demand of the user, so that the user can read the specified E-mails conveniently. The application also discloses an embodiment of a system for extracting E-mails. Through adoption of the system, the E-mail extraction method in the application can be implemented.