Digital security intelligent key and use method thereof

The invention provides a digital security intelligent key and a use method thereof. The key comprises a mainboard, a display screen, password keys, a fingerprint module, a camera, a microphone and a loudspeaker, the data storage chip is used for storing data, the password key is used for inputting a password, the display screen is used for displaying information during operation, the fingerprint module is used for obtaining fingerprint information, the camera is used for obtaining face information, and the microphone is used for obtaining a voice instruction. The voice recognition module and the audio decoding module are used for voice recognition and decoding, the loudspeaker is used for broadcasting operation instructions, and the communication assembly is used for communication between the intelligent key and a Bluetooth gateway or an electronic alarm. When the intelligent key is used for unlocking the electronic alarm, identity authentication needs to be carried out, and the safety degree is higher; the u