The invention discloses a mobile phone access control system, wherein in daily life, a user can generally only leave tasks uncompleted to open a door while hearing a doorbell, and can know the identity of a visitor outside the door through monitoring equipment such as a cat eye, which brings inconvenience and even unsafe factors. The invention discloses a mobile phone access control system, and particularly relates to a system for transmitting pictures and remotely controlling a door lock by virtue of a Bluetooth technology. The system comprises a doorbell, an audio module, a door control sub-system, a door lock sub-system and a mobile phone with a Bluetooth function. The door lock is remotely controlled by the mobile phone to open the door, the picture of the visitor outside the door can be directly seen on the mobile phone, and an audio signal can be sent through an audio key. In addition, a door bell signal can be transmitted to a control module, the control module controls a camera module to automatically take a picture, and then the picture is conveyed to the mobile phone through a Bluetooth module built in the camera module. The mobile phone access control system disclosed by the invention is capable of meeting the requirements of opening the door by the user with a key outside the door and opening the door by using the mobile phone indoors when the doorbell is pressed, thus greatly facilitating the daily lives of people.