According to a method of storing user-based skin condition information using a blockchain of the present invention, in a method implemented through a system including at least one computer interworking with a blockchain network or implementing a designated blockchain network, the user terminal is designated by the user terminal. When the skin condition information for each user issued in the form of a paper document or a portable medium is converted from a medical institution or a skin condition measuring institution into an electronic document format or digital content type user-specific skin condition information transmitted and received through a communication network, the skin condition information is transmitted. The collection unit collects skin condition information for each user in the form of an electronic document or digital content from the user terminal, and the skin condition information storage unit maps the skin condition information for each user and the designated user identification information collected in the form of an electronic document or digital content. Stores and manages the user's skin condition information in a designated database and checks the hash information generated to verify the validity of the user's skin condition information stored in the database, and stores and manages the skin condition information in a designated storage area on the blockchain for management. When the purchaser registers skin condition information purchase registration information for skin condition information purchase, in order to proceed with the purchase of skin condition information corresponding to the skin condition information purchase registration information among tokens issued through the designated blockchain network by the token deposit unit Performing a procedure of depositing a token purchased or issued to the purchaser into an electronic wallet for purchasing the specified skin condition information, and the purchase condition of the purchas
