ZeTo is an open medical information service platform based on EOS blockchain 3.0 technology. ZeTo integrates medical information scattered across different healthcare institutions, forming a complete personal medical information database. ZeTo returns the ownership and control of information to users. Users can set or grant different permissions to others as needed through the ZeTo system, allowing for complete control over their own medical information. Certified healthcare service providers through the ZeTo system can add new medical information to a users personal medical records under user authorization, achieving data chaining, rather than storing it in the institutions database, effectively consolidating fragmented information into a comprehensive information repository.