IRIS Chain is a biometric data-based personalized smart healthcare blockchain service that started with the belief that "the world is 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 blockchainedto eliminate anxiety factors such as personal information leakage.