Authentication method and system

The invention discloses an authentication method and a system. The method comprises the following steps: acquiring user identity information after receiving a user authentication request, wherein the user identity information comprises user identification and at least two biological characteristics; fusing and matching the biological characteristics with each corresponding characteristic model in a pre-registered identity information base, thereby acquiring multiple candidate fusing scores, wherein each registered user identity in the identity information base is corresponding to a set of characteristic model; judging if the registered user identity corresponding to the characteristic model with the highest fusing score is identical to the acquired user identity; if yes, confirming the success of the user authentication; if not, confirming the failure of the user authentication. The authentication method can be utilized to increase the safety of the authentication.