The purpose of this paper is three-fold: to analyze the macrotrend of North Korea’s food supply and demand; to confirm the food security situation in North Korea in various respects; and to seek the sustainable ways of agricultural production as a prerequisite for food security in North Korea. In particular, analyzing North Korea’s weather observation data, which has hardly been considered in previous studies, we investigated how North Korea’s agriculture had been affected by various natural disasters (flood, drought, soil loss etc.) caused by unusual weather. The results show the fact that the agricultural security systems of North Korea is vulnerable to both drought and flood due to extreme precipitation changes, which are closely related to the negative impacts on North Korea’s agricultural activities. In order to enhance the sustainability of North Korea’s agriculture, it is necessary to improve the system (dissolution of collectivization), increase the amount of agricultural materials, enhance soil fertility and develop agricultural machines. Most of all, this research reveals the fact that the most important and fundamental points for food security in North Korea, it needs the systematic strategies to cope with climate change.