The invention realts to a portable terminal telephone directory set device and its call enactment method. The device comprises: phone book; controller; group setup unit; group releasing unit. The saidgroup calling method comprises : starting step for judge whether the search is performed in group; searching step of inputting group assigned number and determining whether the phone number needed toretrieve is present; communication step for select inputting the corresponding serial numbercode and perform call communicating, when performing continuous communicating at the other phone number, the above operating being performed time and time again. The group setup method is composed of: preparation step for retrieving the telephone directory list on producing the group list; group step of inputting the group numbers to the retrieved phone number and inputting the key signal set by group; releasing step of affirming the above resolutive group and inputting the function ley released by group. The invention makes the telephone directory list of phone book of portable terminal set into small group and perform continuous communicating.