This study examines the creation process of the Yeonhaengrok. The Yeonhaengrok or a collection of diplomatic mission records consists of observation and records. Observation can be further divided into direct observation and indirect observation. A diplomatic envoy and his entourage as well as individuals they interacted with function as a knowledge-information provider or conveyor. Records includes those written by Bandang (messenger), Jajegungwan (informal attendants made up of family members of an envoy), and fellow intellectuals, and previous diplomatic mission records and various literatures. It shows the subjects of recording the Yeonhaengrok. The Yeonhaengrok serve to collect and organize knowledge and information obtained during the missions while expanding and reproducing new knowledge and information.