MEDIKEY is a block-chain-based health/life/health information platform that can collect and utilize health information, life pattern information, and medical information distributed and managed by Participants in block chain voluntarily provide health knowhow (Medi story) and record their individual health information (Medi Info) on block chain to share it with other people and prove its usefulness. MEDIKEY is a block chain network that integrates AI, IoT and Big Data that represent 4th industry.various different organizations produced through various smart devices.