The invention relates to an intelligent door system and an operation method thereof. The intelligent door system comprises an outer display screen embedded at the outer side of a door, an inner display screen at the inner side of the door, a camera, an intelligent door lock and an injection device. The intelligent door system is characterized by further comprising a controller which is in signal connection with the outer display screen and the inner display screen, wherein a face recognition module, an emotion monitoring module, a voice module, a call module, a video module, an alarm module and a wireless module are arranged in the controller. By arranging the face recognition module, the emotion monitoring module, the voice module, the call module, the video module, the alarm module and the wireless module, the intelligent door system can directly recognize an image captured by the camera, so that a proprietor can directly enter the room without a key; information of a visitor can be known by the proprietor at any moment, thereby preventing the visitor from being neglected; and information of a strange visitor can also be known by the proprietor at any moment, and when the strange visitor plans an illegal activity, an anti-theft measure can be taken to avoid unnecessary loss.