This study is to firstly investigate information infrastructure in North Korea such as communication network, hardware, software and etc, and then, based on it, to grasp the present condition of information technology in libraries there. Also, it is to analyze the information system of science technology in order to research the circulation system of science information with focusing on the Central Science Technology Intelligence (CSTI), a representative intelligence agency for science technology in North Korea, and on the retrieval program of “KWANGMYOUNG System”developed by CSTI and used broadly.