This book has combined the design and problem solving skills of engineering with medical and biological sciences to improve health care diagnosis and treatment. Position monitoring system of patients will ensure safety by detecting position displacement after falling from toilet, chair or bed. So it would be possible to take instant measures to treat them which may save life. For this system, IR sensors are used as position sensors which send signal to microcontroller and the position of patients are displayed on LCD and make alarm if patient is in unusual position. This position monitoring system is too much cheap . Because , here just used some simple electronic devices which are available in the market. This system will be too much reasonable in 3rd world countries where top level of hospitality is not too much available in Hospital. Even though , this book has just described the fundamental principal of position monitoring system.