Embodiments of the present invention provide a network access method and apparatus, and a network system. The method includes: receiving, by first user equipment through a wireless fidelity Wi-Fi network, account information sent by second user equipment; sending, by the first user equipment, the account information to a mobility management entity MME, so that the MME establishes, between the first user equipment and a gateway according to the account information, a dedicated bearer serving the second user equipment; and establishing, by the first user equipment, a mapping relationship between identification information of the second user equipment and the dedicated bearer after determining that the establishment of the dedicated bearer is completed, where the identification information of the second user equipment is used for distinguishing the second user equipment that accesses the first user equipment through the Wi-Fi network.