A method for authenticating a user using biometrics and digitized handwritten signature, comprising: a first procedure that is associated with fingerprint verification, and that includes a step of, by a biometric stylus that stores a piece of encrypted identification data and a fingerprint template of the user therein and that is capable of fingerprint recognition, generating a piece of first verification data that includes the encrypted identification data when determining that a fingerprint captured by the biometric stylus matches the fingerprint template of the user, wherein the encrypted identification data is related to an identity of the user; a second procedure that is associated with handwriting input, and that includes steps of: by a handwriting input device, receiving the first verification data from the biometric stylus, by the handwriting input device, acquiring (701, 701') a handwriting pattern that is inputted on the handwriting input device through touch sensing using the biometric stylus, and by the handwriting input device, generating (704, 704') a piece of second verification data that is encrypted and that includes the encrypted identification data and the handwriting pattern; and a third procedure that is associated with user identification and that includes steps of: by a verification server, receiving the second verification data from the handwriting input device, by the verification server, decrypting the second verification data (801, 801') to obtain the encrypted identification data and the handwriting pattern, and by the verification server, decrypting the encrypted identification data to obtain a piece of user identification data for verifying the identity of the user when determining at least that the handwriting pattern matches a handwriting template of a piece of personal identification data stored in the verification server. a first procedure that is associated with fingerprint verification, and that includes a step of, by a biometric stylus that stores a piece of encrypted identification data and a fingerprint template of the user therein and that is capable of fingerprint recognition, generating a piece of first verification data that includes the encrypted identification data when determining that a fingerprint captured by the biometric stylus matches the fingerprint template of the user, wherein the encrypted identification data is related to an identity of the user; a second procedure that is associated with handwriting input, and that includes steps of: by a handwriting input device, receiving the first verification data from the biometric stylus, by the handwriting input device, acquiring (701, 701') a handwriting pattern that is inputted on the handwriting input device through touch sensing using the biometric stylus, and by the handwriting input device, generating (704, 704') a piece of second verification data that is encrypted and that includes the encrypted identification data and the handwriting pattern; and by a handwriting input device, receiving the first verification data from the biometric stylus, by the handwriting input device, acquiring (701, 701') a handwriting pattern that is inputted on the handwriting input device through touch sensing using the biometric stylus, and by the handwriting input device, generating (704, 704') a piece of second verification data that is encrypted and that includes the encrypted identification data and the handwriting pattern; and a third procedure that is associated with user identification and that includes steps of: by a verification server, receiving the second verification data from the handwriting input device, by the verification server, decrypting the second verification data (801, 801') to obtain the encrypted identification data and the handwriting pattern, and by the verification server, decrypting the encrypted identification data to obtain a piece of user identification data for verifying the identity of the user when determining at least that the handwriting pattern matches a handwriting template of a piece of personal identification data stored in the verification server. by a verification server, receiving the second verification data from the handwriting input device, by the verification server, decrypting the second verification data (801, 801') to obtain the encrypted identification data and the handwriting pattern, and by the verification server, decrypting the encrypted identification data to obtain a piece of user identification data for verifying the identity of the user when determining at least that the handwriting pattern matches a handwriting template of a piece of personal identification data stored in the verification server.