Security Has Becoming An Important Issue Everywhere. Home Security Is Becoming Necessary Nowadays As The Possibilities Of Intrusion Are Increasing Day By Day. Safety From Theft, Leaking Of Raw Gas And Fire Are The Most Important Requirements Of Home Security System For People. A Traditional Home Security System Gives The Signals In Terms Of Alarm. However, The GSM (Global System For Mobile Communications) Based Security Systems Provides Enhanced Security As Whenever A Signal From Sensor Occurs, A Text Message Is Sent To A Desired Number To Take Necessary Actions. This Project Suggests Four Methods For Home Security System. The Performance Of The Sensors Of A Low Cost Short Message System (SMS) Based Home Security System Equipped With Motion Sensor, Smoke Detector, Temperature Sensor, Humidity Sensor And Light Sensors Has Been Studied.