A method for transmitting a media independent handover, MIH, message, characterised by comprising: obtaining, by a sending end, address information of an MIH service entity of a receiving end; dividing, by the sending end, a first MIH message into segments; encapsulating, by the sending end, each of the segments into a first transmission control protocol, TCP, segment; encapsulating, by the sending end, the first TCP segment into a first Internet protocol, IP, data packet, and sending out, by the sending end, the first IP data packet according to the address information of the MIH service entity of the receiving end; wherein the sending end is a mobile terminal and the obtaining the address information of the MIH service entity comprises: the mobile terminal obtains the address information of the MIH service entity from a routing announcement, in which the address information is included, of a router, if the mobile terminal obtains a forwarding address at a foreign network by a stateless address automatic configuration process in a mobile IPv6 system; or the mobile terminal obtains the address information of the MIH service entity from a DHCP message, in which the address information is included; or the mobile terminal obtains the address information of the MIH service entity by a discovery method of Domain Name Service for service discovery, DNS SRV; or the mobile terminal obtains the address information of the MIH service entity during an authentication process for the mobile terminal to access a visited network. obtaining, by a sending end, address information of an MIH service entity of a receiving end; dividing, by the sending end, a first MIH message into segments; encapsulating, by the sending end, each of the segments into a first transmission control protocol, TCP, segment; encapsulating, by the sending end, the first TCP segment into a first Internet protocol, IP, data packet, and sending out, by the sending end, the first IP data packet according to the address information of the MIH service entity of the receiving end; wherein the sending end is a mobile terminal and the obtaining the address information of the MIH service entity comprises: the mobile terminal obtains the address information of the MIH service entity from a routing announcement, in which the address information is included, of a router, if the mobile terminal obtains a forwarding address at a foreign network by a stateless address automatic configuration process in a mobile IPv6 system; or the mobile terminal obtains the address information of the MIH service entity from a DHCP message, in which the address information is included; or the mobile terminal obtains the address information of the MIH service entity by a discovery method of Domain Name Service for service discovery, DNS SRV; or the mobile terminal obtains the address information of the MIH service entity during an authentication process for the mobile terminal to access a visited network. the mobile terminal obtains the address information of the MIH service entity from a routing announcement, in which the address information is included, of a router, if the mobile terminal obtains a forwarding address at a foreign network by a stateless address automatic configuration process in a mobile IPv6 system; or the mobile terminal obtains the address information of the MIH service entity from a DHCP message, in which the address information is included; or the mobile terminal obtains the address information of the MIH service entity by a discovery method of Domain Name Service for service discovery, DNS SRV; or the mobile terminal obtains the address information of the MIH service entity during an authentication process for the mobile terminal to access a visited network.