This book illustrates the development process of making a versatile application drone which can be used as first responder and environment analyzer where humans cannot involve, for example to measure and report the environmental temperature, pressure, humidity and radiation in disaster zones, caves, tunnels and monuments. As ambulance drone to measure patient's vital signs and to aid in emergency situation by carrying medicines and first aid kits. Vital signs measurement of human body is important procedure which enable to determine disease and recovery, remote monitoring of vital signs will enhance in providing proper aid to patients with assistance from doctors remotely. As conversation drone to identify, quantify and track animals and to alert hunting and poaching activities in wildlife habitats to ensure safety and reduce human effort to a large extend. As surveillance drone in military to alert on unusual and intruder activities, and in agriculture field to report the statusof crops to automate irrigation and fertilization.