In addition to exploration, explanation and prediction, the ultimate goal of science is creation. In the field of life science, enthusiasm towards creation originates the synthetic biology. During the last decade, numerous artificial biological networks had been made by rearranging the exited biological macromolecules. Recently, creation of the macromolecules inside biological networks emerges as a hotspot. Because of structural simplicity and manipulation convenience, RNA becomes an ideal model for conducting such researches.