This platform allows people to trade their used car without any dealer’s interference. It is based on reliable car-history data so that people can trade their car peer to peer directly and create a transparent and equal socity. This platform enables people to make profits by lending their cars. By sharing car-history data, anyone can use the owner’s car easily and cheaply, which can be a foundation of vehicle sharing economy business model. For everyone to use equitable P2P used-car transaction and convenient P2P car-sharing transaction.