In this chapter, we are reporting a novel in-home monitoring system designed to for elder-care application. The statistics shows that there is increasing number of elderly people around the world and this isn't going to change. We developed a smart system consists of optimum number of wireless sensors that includes current, bed, and water flow sensors. The sensors provide information that can be used for monitoring elderly by detecting abnormality pattern in their active daily life. The system will generate early warning message to care giver, when an unforeseen abnormal condition occurs. It will also, analyze the gathered data to determine resident's behavior. Instead of using many number of sensors, the importance of positioning the optimal number of intelligent sensors close to the source of a potential problem phenomenon, where the acquired data provide the greatest benefit or impact has been discussed.