According to the method for purchasing user-based skin condition information based on the 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, provided at a designated base If the information device converts and transmits the skin condition information for each user issued in the form of a paper document or a portable medium from a designated medical institution or skin condition measurement institution to a skin condition information for each user in the form of an electronic document or digital content that can be transmitted and received through a communication network. The skin condition information collection unit collects skin condition information for each user in the form of an electronic document or digital content from the information device, and the skin condition information storage unit specifies the skin condition information for each user collected in the form of an electronic document or digital content and a designated user Maps identification information to generate user skin condition information that can be stored in the blockchain and stores and manages the skin condition information in a designated storage area on the block chain for storage and management of skin condition information. Upon registration, the token deposit or purchase token issued to the purchaser is used to purchase the specified skin condition information in order to proceed with the purchase of the skin condition information corresponding to the skin condition information purchase registration information among tokens issued through the designated blockchain network. When the procedure for depositing in the electronic wallet is performed, and the purchaser's skin condition information purchase registration information is announced through the web or app, at least one user requests the skin condition information transaction based on
