The invention relates to a remote authentication method based on biological characteristic comprising following steps that user transmits access request information message to proxy ID1,proxy ID1 consults secretly with authenticator ID2 to create a secrete information and randomly produce a key K, authenticator ID2 transmits public information to proxy ID1,proxy ID1 transmits biological information collection request to user and collects biological information of user, proxy ID1 compute key and authenticate if the key is the one authenticator ID2 selects to complete remote authentication of biological characteristic for user. In the invention biological characteristic off-site or remote authentication between user and authenticator is accomplished, simultaneously user physical identity isauthenticated, which more effectively guarantee safety, reliability of system.