In this paper, the authors develop a system to control the relay circuit of an embedded system via the android smart phone. The user accesses the security system via tablet or any portable devices. For establishing this, what they need is Bluetooth connectivity with their controllers well as their tablet/mobile. They have to make the connection by pairing it. Once it is done the communication can be possible. The project is developed in java programming language by using the eclipse Integrated Development Environment (IDE).