The embodiment of the invention discloses a method for transmitting wireless broadband service messages between a user terminal and a wireless network. After the common IP address provided by an internet service provider is distributed to user equipment (UE), the method comprises the steps of: receiving an IP data message which is transmitted from a standard network interface by the UE; converting the IP data message into a wireless data message, forwarding the wireless data message to a destination IP address, converting the wireless data message into the IP data message and sending the IP data message to the common IP address of the UE while receiving the wireless data message from the destination IP address. The embodiment of the invention also discloses a device for realizing the method and a communication apparatus comprising the device. In the embodiment of the invention, the user terminal only needs to support an ordinary RJ45 standard network interface, a user does not need toreplace a novel terminal, the available resources of the user are used furthest, and the equipment cost is saved.