The invention provides a terahertz ring couple device based on a photoselective regulation of metal-two-dimensional organic-inorganic hybrid perovskite material and a preparation method thereof, relates to the field of microelectronics and terahertz metamaterial functional devices, and solves the problems of complicated structure and preparation process, single function and narrow application range of the existing terahertz ring dipole metamaterials. The device comprises a substrate, two periodically arranged double-opening metal resonance ring structural units and two-dimensional organic-inorganic hybrid perovskite with different components respectively covered on the two double-opening metal resonance rings. The method comprises the steps: high resistance silicon is coated with photoresist, pre-baked, exposed, developed and fixed; metal is deposited; Parylene is deposited to form a mask structure; a perovskite solution is coated; annealing is performed; Parylene is deposited to forma mask structure; the perovskite solution is coated; and annealing is performed. The device has the advantages of simple application conditions, free switching of working modes, simple process and lowcost. The device is applied to the field of microelectronics and terahertz metamaterial functional devices.