Bluetooth module based access control system and access control method thereof

The invention relates to a bluetooth module based access control system and an access control method thereof. The motor-driven control signal output terminal of the one-chip microcomputer of the bluetooth module based access control system is connected with the motor-driven control signal input terminal of a motor-drive circuit, the driving signal output terminal of the motor-drive circuit is connected with the driving signal input terminal of a direct current motor, the direct current motor is used for unlocking or locking a mechanical lock, the data terminal of the one-chip microcomputer is connected with the data terminal of a first bluetooth module, the first bluetooth module is used for receiving the wireless signal emitted by a second bluetooth module, and the data terminal of the second bluetooth module is connected with an unlocking control data terminal of a mobile phone. The access control method realizes the control of the unlocking and locking of the mechanical lock by the one-chip microcomputer through sending a password to the one-chip microcomputer from the mobile phone in order to realize low cost and high safety. The system and the method can be used in the access control field and the like.