The invention provides an intelligent access control system based on a sensor network. The intelligent access control system based on the sensor network comprises a central processing device, a temperature sensor, a signal processing circuit, a fingerprint acquisition module, a camera, a first trigger module, a temperature identification module, a fingerprint identification module, a second trigger module, n image recognition module, a third trigger module, a gate control module, a non-gate circuit and an alarm module, wherein the temperature sensor is used to confirm the human body entering the access control, and the signal processing circuit is used to improve the temperature monitoring accuracy; when detecting that there is a human body, the fingerprint collection module is triggered to perform fingerprint collection operations; when the collected fingerprint is the fingerprint of the person who is allowed to enter the access control, the camera is further triggered to perform image collection, and then the image recognition module extracts the feature information of the image for further judging whether the person who enters the access control is allowed to enter the access control.