This invention describes a special type of drone called “Flying User Interface” device comprised of a robotic projector-camera system, an onboard digital computer connected with Internet, sensors, and a hardware interface to stick to any surface such as wall, ceilings, etc. Computer further consists of other subsystems, devices, and sensors such as accelerometer, compass, gyroscope, flashlight, etc. Drone flies from one places to another, detects a surface, and sticks to it. After successful sticking mechanism, device stops all its rotators and projects or augments images, information, and user interfaces on the near by surfaces. User interface may contain applications, information about object being augmented and information from Internet. User can interact with user-interface using command and gestures such as hand, body, feet, voice, etc.