Visitor management system and method based on block chain

The invention relates to a visitor management system and method based on a block chain. Comprising a visitor registration module used for collecting basic information of a visitor, generating a unique visitor identifier according to the basic information, and uploading the basic information and the visitor identifier to a block chain; the identity authentication module is used for performing identity authentication on the basic information of the visitor according to a pre-stored public security department criminal database so as to confirm the identity information of the visitor, and uploading the identity information to the block chain; the visitor authority verification module is used for carrying out access authority verification on the visitor identifier of the visitor whose identity information is confirmed so as to confirm the access authority of the visitor, and uploading the access authority to the block chain; and the visitor recording module is used for recording access record information of visito