IRIS Chain is a personalized smart healthcare blockchain service based on biometric data that started with the belief that "the world is made safer and healthier through the eyes." Because the iris has a lot of health information, it uses this iris information to measure and prevent the health of the customer's life cycle from time to time so that they can live a "quality of life healthy and long" rather than just a long life. Sensitive personal healthcare information has been blockchain to eliminate anxiety factors such as personal information leakage.