A method and a device of identity verification are disclosed. The method includes: receiving by a server, an identity verification request sent from a terminal, where the identity verification request contains a specified user identifier; based on a user relationship chain of the specified user identifier, obtaining a verified user information set which includes user's information on the user relationship chain; providing the verified user information set to the terminal in order to subsequently receive returned selected user's information; determining whether the received selected user's information from the terminal matches the user's information on the user relationship chain; if the selected user's information received matches the user's information on the user relationship chain, confirming that the identity verification being successful. To pass the identity verification, the only requirement is that the selected user's information received from the terminal matches the user's information on the user relationship chain.