The invention relates to the technical field of electronics, and discloses an intelligent door lock snapshot method and a system thereof. In the invention, the intelligent door lock detects a switching state of a lock, when the intelligent door lock detects that the switching state of the lock is changed from closing to opening, a snapshot instruction is sent to an associated camera, when the camera receives the snapshot instruction, snapshot is carried out, then an image from snapshoot enables feedback to preset electronic equipment. Through this mode, when a user sends a door opening instruction so as to change the switching state of the intelligent door lock from closing to opening, a visitor is coming, and the user allows the visitor to come in, at the moment, snapshot is carried out by the camera for recording a scene at the door when the door is unlocked, so that the system provides possibility for knowing whether the visitor enters the door or not and provides identity for people entering the door according to the image, and the system has deterrent effect to lawless persons, and increases the safety factors of dwelling house.