The Aim Of This Project Is To Develop An Embedded System To Create A Residential Safety System With Gas And Fire Detection And Auto Intimation To User Mobile. There Are Two Sensors Used To Detect The Fire Accident And The Gas Leakages In The Building. In This We Use GSM Modem For The Automatic Intimation To User Mobile. This Paper Describes The Development Of An Economical, Convenient, And Reliable GSM Based Automated Fire Alarm System For Remotely Alerting Fire And Smoke Incidents To The Property Owner Outside The Building Or Industrial Premises Quickly By Sending Short Message Via GSM Network. Along With Study Of Existing Fire Detecting Systems. It Also Supports Full Panel Programming Using Embedded C And Network Diagnostics. Here The Fire And The Gas Are Monitored Continuously Inside The House With The Help Of Sensors Which Are Interfaced With Microcontroller Using ADC. If Any Sensor Senses An Abnormal Condition Micro Controller Switch On The Alarm (buzzer) Until The Reset Button Is Pressed And Also Sends A SMS To The User Mobile Using GSM Modem. Thus The Alert Information Is Given To The User Mobile Through The GSM Modem. Then The User Can Take Necessary Actions To Avoid The More Accidents In The House.