ZeTo is an open medical information service platform based on EOS blockchain 3.0 technology. ZeTo integrates medical information scattered in different medical institutions to form a complete personal medical information database. ZeTo returns information ownership and control back to users. Users can set or authorize others to have different permissions through the ZeTo system according to their needs, so as to fully control their own medical information. Medical service providers certified by the ZeTo system can add new medical information to the user's personal medical file under the user's authorization, and realize data uploading, instead of saving it to the database of the medical institution. Fragmented information is integrated into a complete information base.