The invention provides a home gateway dial-up networking method, a system and user equipment. The method includes: a business authentication platform receives an account opening request sent by the user equipment and generates a networking account according to user identification information carried in the account opening request; a passport platform receives a login request sent by the user equipment, determines the user identification information according to a passport account carried in the login request and sends a binding request to the business authentication platform, wherein the user identification information is carried in the binding request; the business authentication platform sends the networking account corresponding to the user identification information to the passport platform according to the binding request; the passport platform stores a corresponding relation between the passport account and the networking account and controls a home gateway corresponding to the user equipment to perform dial-up networking according to the networking account. The home gateway dial-up networking method, the system and the user equipment have advantages that simplicity and convenience in operation are achieved, and convenience is provided for users.