Home security is essential for part for a safe home. This paper aims in developing a low-cost and intelligent security system using thermal heat, passive IR and proximity sensors. Arduino Uno board which act as a microcontroller unit receives continuous data from all these sensors and processes them. The arduino will trigger an alarm and alert messages will be sent to user's mobile via GSM in case of untoward situations. Sensor LM35 (temperature sensor) is used to prevent fire damage to human life by detecting temperature change beyond a certain limit. Proximity sensor uses Hall Effect principle to detect any intrusion through doors and windows whereas the low-power Passive Infrared (PIR) detectors take advantage of pyro-electricity to detect a human body that is a constant source of infrared radiation. Use of artificial intelligence to generate patterns of intrusion based on map of the house and entrance will help in configuring the device individually thereby further increasing the safety of the house. Hence the device serves the purpose of safety and security.