Subway connection:
Back at Jonggak station, take Line No. 1
You get off at Hoegi, and follow the directin of Kyung Hee University.
KIAS is within 15 minutes walk. 
You may also take a bus at the nearby stop, Huikyeong Market, which is near to the Hoegi subway station.
and then cross the road to take a bus No. 273.
KIAS is in front of the 3rd bus stop, KAIST or Hongneung Elementary School.

Bus connection:
You take a bus No. 271 at the bus stop, close to Koreana.
Get off at the KAIST or Hongneung Elementary School.