When you arrive at Incheon International Airport, take the KTX to Pohang station.
From Pohang station you can take a taxi to campus. Ask the driver to go to "Handong Dae Hak Gyo(Handong University)".
Price around 10,000 KRW
Travel Time about 10 minutes
* Rail Ticket Reservation: http://www.letskorail.com/ebizbf/EbizBfTicketSearch.do