A presence service access device is disclosed for a presentity to publish presence information and transmit said information to the presence server, the device comprising a presentity communication module and a service scheduling control module. Further disclosed is a presence service system using the presence service access device, comprising a presentity, a presence service access device, a presence server, and a watcher client. Also disclosed is a method of publishing and acquiring presence information comprising steps of: 1. a presentity which publishes presence information; 2. the presence service access device which receives the presence information published by the presentity and forwards the same to a presence server; and 3. the presence server which distributes the presence information to corresponding watcher client. According to the present invention, various presentities provide presence information to watcher clients by connecting presence servers through a presence service access device.