Smart home security system based on Internet of Things

A smart home security system based on Internet of Things belongs to the technical field of Internet of Things, and aims to solve the problems that a lawbreaker forcibly prizes a door lock or directly and violently disassembles a door plate, so that a foreign person can enter a room, the defensiveness of a home door is poor, the door plate and a door frame plate are easily separated from each other under the condition of large acting force, and the security of the home door is poor. And when the resident is outside, the resident cannot timely know the condition at home. A user is notified in a short message mode through the resident communication unit, a short message distress signal is sent to the public security through the public security alarm unit, the camera probe collects face information of external personnel, and the data transmission unit transmits a face image to the resident; the security built-in locks are arranged at the four corners of the household door, so that when the household door is in an