Method, device and system for improving transaction security of meta universe

The invention provides a method, a device and a system for improving the transaction security of a meta universe, and relates to the technical field of meta universe security. The method comprises the steps of obtaining transaction information generated when a meta universe user and an interaction object perform a transaction, and storing the transaction information on a transaction block chain; a plurality of transaction blocks are configured on the transaction block chain, and a plurality of pieces of transaction information and non-transaction information are packaged in any transaction block; the non-transaction information records security information related to a transaction environment for ensuring the transaction, the security information comprises a transaction security level, and the transaction security level is matched with the transaction amount involved in the transaction. According to the invention, the transaction information of the meta universe user and the interaction object is stored on th