The invention discloses an address distributing method, a client terminal, a server and an address distributing system. The address distributing method comprises the following steps: the client terminal receives IP address feedback information sent by a dynamic host configuration protocol (DHCP) server, in which the IP address feedback information includes an IP address distributed by the DHCP server for the client terminal; the client terminal carries out address conflict detection to the IP address; if the IP address has a conflict, the client terminal sends declining information to the DHCP server and sends a new IP address application process to the DHCP server; if the IP address has no conflict, the client terminal sends acknowledgement information to the DHCP server. The client terminal carries out the address conflict detection to the IP address of the DHCP server, so that the technical problem of the client terminal incapable of bearing services caused by the repetition of the IP address is solved.