SMS based Industrial Security system using GSM technology has application in all types of security systems. It can be used in industrial security system, in offices, in shop. User has to send password through SMS to the project. Then microcontroller will read the SMS using GSM modem. If the password is correct then access is allowed to the user. We have provides a DC motor and a Relay to show demo of valid access to the security system. A buzzer will be turned on if the password is incorrect.