Unlock Door Normally, humans spend their lives simply together with natural surroundings. Even though the natural simple life can provide human convenient, it is still not enough for human needs due to the technological advances nowadays. Many common things are developed for responding the endless needs of human by applying the technological knowledge to make things become high-technology product and can lead human to more convenient and easier lives. According to the human needs, curtains, which generally operate with the manual system that sometimes can be inconvenient for using, are developed to be ‘Smart Curtain’ that can operates automatically which physically brings the convenience to users.