This project product makes use of a motion sensor interfaced with a microcontroller and some additional devices which makes smart theft prevention system for Shop/House/ building.When the thief enters into the Shop/House/Building where our product is installed, Phone call is made to the owner whose number is initially coded in the micro controller Photos of the thief is taken at regular intervals of time using a high-resolution camera module and these photos are sent as an email to the mail I’d of the owner using Internet Of Things(IOT).Provisions are made to control the equipments such as Lights (ON and OFF) and Siren (ON and OFF) through text messages or by using emails of secret code words.