Abstract: This dissertation studies the theorys and structures of a kind of metamaterial which are based on metal. Compared with the traditional EIT system, it tries to do the research on the excitation mechanism and the method to certificate the appearance of the phenomenon. With the help of the other material, metamaterial with the phenomena of EIT in THz is designed and the basic knowledge and defination is also explained. This article also place the research on the excitation of both of the two parts(inner ring and outer ring), and what come next is the whole structure under incident wave. In addition, the research analyses the distribution of probes and the thickness of the rings. These achievements could lead to a number of important fundamental and technological advances in the field of metamaterial of THz.