The purpose of this study was to prove that there is inherently golden ratio and color harmony in nature and to investigate some examples that have applied this elements in and out of construction . This is to provide a momentum to explore another new principles of nature and apply them to not only interior but also another design field. Under this purpose, the author of this study reviewed general theories on golden ratio and colour harmony and related them to leaves of plant and flowers to consider. As a result, it has revealed that theoretical golden ratio and colour harmony coincide with the order of nature, and this has made the author to investigate certain examples applied some orders owe can see in the plants to the interior or exterior parts of construction. There are lots of principles in nature still unrevealed to us, and therefore we must consistently make efforts to study new formative orders to apply them.