The invention discloses a cryptographically generated address (CGA) configuration method which is used for leading the CGA to be capable of meeting the network configuration requirement. The method comprises the steps as follows: a dynamic host configuration protocol (DHCP) server receives a client side configuration sent by a client side; the DHCP server generates a CGA according to the client side configuration and the network configuration of the DHCP server; and the DHCP server issues the CGA to the client side. Through the embodiment of the invention, the CGA can be generated referencing to the network configuration, thus overcoming the defect that the CGA generated by the client side in the prior art can not meet the demand of network configuration, leading the network administration plane to be capable of interfering the generation of the CGA, and improving the network administration capability.