A method for acquiring a handover address of a mobile node, comprising: receiving, by a Dynamic Host Configuration Protocol, DHCP server of a local link, a request message sent before the mobile node roams from a local link to a foreign link, the request message carrying information which requests to obtain a handover address of the mobile node on the foreign link; based on the request message, making, by the DHCP server of the local link, a request to a DHCP server of the foreign link for obtaining the handover address of the mobile node on the foreign link; generating and sending, by the DHCP server of the local link, a reply message to the mobile node, the reply message carrying the handover address of the mobile node on the foreign link, characterized in that the step of making a request to the DHCP server of the foreign link comprises: based on the request message, generating and sending, by the DHCP server of the local link, a handover request message to the DHCP server of the foreign link, requesting to obtain the handover address of the mobile node on the foreign link; receiving, by the DHCP server of the local link, a handover reply message, wherein, the handover reply message is generated by the DHCP server of the foreign link based on the handover request message, and the handover reply message carries the handover address of the mobile node on the foreign link. receiving, by a Dynamic Host Configuration Protocol, DHCP server of a local link, a request message sent before the mobile node roams from a local link to a foreign link, the request message carrying information which requests to obtain a handover address of the mobile node on the foreign link; based on the request message, making, by the DHCP server of the local link, a request to a DHCP server of the foreign link for obtaining the handover address of the mobile node on the foreign link; generating and sending, by the DHCP server of the local link, a reply message to the mobile node, the reply message carrying the handover address of the mobile node on the foreign link, characterized in that the step of making a request to the DHCP server of the foreign link comprises: based on the request message, generating and sending, by the DHCP server of the local link, a handover request message to the DHCP server of the foreign link, requesting to obtain the handover address of the mobile node on the foreign link; receiving, by the DHCP server of the local link, a handover reply message, wherein, the handover reply message is generated by the DHCP server of the foreign link based on the handover request message, and the handover reply message carries the handover address of the mobile node on the foreign link. based on the request message, generating and sending, by the DHCP server of the local link, a handover request message to the DHCP server of the foreign link, requesting to obtain the handover address of the mobile node on the foreign link; receiving, by the DHCP server of the local link, a handover reply message, wherein, the handover reply message is generated by the DHCP server of the foreign link based on the handover request message, and the handover reply message carries the handover address of the mobile node on the foreign link.