Traditional　application　uses　centralized　database　and　the　data　is　managed　and　maintained　by　a　single　institution.　Blockchain　is　a　decentralized,　non-tamperable,　traceable,　multi-party　distributed　database,　which　can　greatly　improve　the　security　of　data.　It　is　crucial　to　transfer　traditional　application　to　blockchain-based　application　for　many　application　scenarios.　However,　as　a　new　field,　most　developers　are　not　familiar　with　blockchain　technology.　Therefore　we　propose　a　method　to　transfer　the　traditional　application　to　application　based　on　Hyperledger　Fabric.　First,　we　finish　the　secondary　development　of　Fabric-sdk-java　and　define　a　set　of　API　mapping　rules.　Secondly,　we　compare　the　storage　model　between　Mysql　and　CouchDB,　and　implement　a　SQL-Fabric　transformation　engine　through　the　smart　contract,　which　can　parse　SQL　and　automatically　transform　into　read　and　write　operations　on　the　distributed　ledger.　©　2020,　Springer　Nature　Singapore　Pte　Ltd.