Abstract
In trade transactions, in addition to exporters and importers, many companies and public institutions such as shipping companies, airlines, transportation companies, customs brokers, banks, insurance companies, customs, etc., are involved and among them Procedures have been carried out and passed. Various types of documents were used in the procedure of trade transaction, and it was a problem that it took time to take the exchange and that adjustment between the parties were complicated. In this way, a method for improving the efficiency of complicated procedures in documents by using block chain technology has been studied. In this report, we discuss the advantages and future problems of that case.