The invention provides a method and a device for recognizing persons through an intelligent access control machine. The method comprises steps as follows: acquired person image information is imported into the intelligent access control machine to be used as a training sample, and the intelligent access control machine learns the training sample to train a verifier; the intelligent access control machine verifies IDs of access persons by the aid of the trained verifier and judges whether verification succeeds or not, if yes, the intelligent access control machine begins to acquire image information of access persons within a set range from the position where verification succeeds, extracts feature information, associates the IDs of the access persons, the feature information as well as the feature information generation time and position information and stores the information in a database; otherwise, the intelligent access control machine returns that verification fails; the verifier is retrained with associated data stored in the database used as the training sample, and returning is performed. The method and the device for recognizing the persons through the intelligent access control machine have the benefits as follows: the recognition rate is higher, the misrecognition rate is lower, and human body posture recognition accuracy is higher.