Provided is a method for requesting to add an adminee and to assign a PN (personal network) admin and changing information about the adminee in a personal network (PN). The method may be initiated by a PN element which desires to be the PN admin and change the information about the adminee or a PN gateway in the PN. If the PN element initiates the method, the PN element can request assignment of the PN admin to a CPNS (converged personal network service) server when a result of requesting addition of the adminee for another PN element is successful. Also, the PN element which has become the PN admin can request change of specific information about the adminee to the CPNS server when a result of requesting to change the specific information from the adminee is successful.