According to some experts, Feng shui theory is a combination of science and art in which it has a relationship with astrology, aesthetics, ecology, philosophy, and interior design. In the interior design we can create a comfortable dwelling, attractive, elegant, and fun for the whole family. Because feng shui has five elements in which all the elements must be in balance in accordance with the portions of each in order to reach a harmony in interior design. The rule set in a theory in which the designers refer to it as the most basic rules of feng shui. Ideas & Inspirations.