A method for preparing a thin film polymer structure having a functional substance on an A surface and a B surface of the film, the polymer structure being obtained by: (a) adsorbing polyfunctional molecules to a region of an arbitrary shape in an interface between a substrate body and a liquid phase (b) polymerizing and/or crosslinking the adsorbing polyfunctional molecules to form a polymer thin film (c) bonding a functional substance to the A surface of the formed thin film and then forming a soluble support film on the A surface (d) exfoliating the thin film and the soluble support film from the substrate body and (e) bonding to the B surface of the thin film a functional substance identical to or different from the functional substance bonded to the A surface and then dissolving the soluble support film with a solvent.
