The invention relates to an intelligent door lock. The intelligent door lock comprises a
front panel, a back panel, a lock head, a front
handle and a back
handle. The lock head comprises a lock body, a lock head panel, an inclined tongue, a safety square tongue, a counter lock square tongue, a top and bottom hook and a lock cylinder, and a square hole, a lock cylinder hole and a counter lock square hole are formed in the lock body. A key hole is formed in the
front panel and is communicated with the lock cylinder hole, and a counter lock knob is arranged on the back panel and penetrates through the back panel to be communicated with the counter lock square hole. A camera, a keyboard and a
fingerprint collecting window are arranged on the
front panel, a battery, a circuit board and a motor are arranged on the back panel, the battery is electrically connected with the camera, the keyboard, the
fingerprint collecting window and the motor, the keyboard and the
fingerprint collecting window are electrically connected with the motor through the circuit board, and the motor is connected with the lock cylinder through the lock cylinder hole. The intelligent door lock is simple in structure and variable in function, and is particularly applied to transforming a common mechanical safe-guard chain door lock into the intelligent door lock; the overall door lock can be transformed and upgraded without detachment, and operation is easy and rapid.