A method for preparing a thin or thick film, comprising the steps of: arranging non-spherical seed crystals on a substrate such that all the a-, b- and c-axes of each seed crystal are oriented under a predetermined rule by a process comprising the steps of: preparing a substrate, the surface of which has depressions capable of fixing the position and orientation of seed crystal; and placing seed crystals on the substrate, and then applying physical pressure to the seed crystals to insert a portion or the whole of each seed crystal into each of pores defined by the depressions; or by a process comprising the steps of: preparing a template, the surface of which has depressions capable of fixing the position and orientation of seed crystal; and placing seed crystals on the template, and then applying physical pressure to the seed crystals to insert a portion or the whole of each seed crystal into each of pores defined by the depressions thereby to arrange the seed crystals on the template; and bringing the template having the seed crystals arranged thereon into contact with a substrate to transfer the seed crystals onto the substrate; and forming and growing the film from the seed crystals through secondary growth by exposing the arranged seed crystals of step to a seed crystal growth solution containing a structure-directing agent, which induces only secondary growth from the surface of the seed crystals without inducing crystal nucleation in the crystal growth solution or on the seed crystal surface, wherein in step, the seed crystals have all the a-, b- and c-axes thereof oriented uniformly on the substrate, such that all the a-axes of the seed crystals are parallel to each other, all the b-axes of the seed crystals are parallel to each other, and all the c-axes of the seed crystals are parallel to each other, wherein in step, the seed crystals are two-dimensionally connected to each other and three-dimensionally grow perpendicular to the substrate surface by secondary growth from the seed crystal surface, to thereby form the film. arranging non-spherical seed crystals on a substrate such that all the a-, b- and c-axes of each seed crystal are oriented under a predetermined rule by a process comprising the steps of: preparing a substrate, the surface of which has depressions capable of fixing the position and orientation of seed crystal; and placing seed crystals on the substrate, and then applying physical pressure to the seed crystals to insert a portion or the whole of each seed crystal into each of pores defined by the depressions; or by a process comprising the steps of: preparing a template, the surface of which has depressions capable of fixing the position and orientation of seed crystal; and placing seed crystals on the template, and then applying physical pressure to the seed crystals to insert a portion or the whole of each seed crystal into each of pores defined by the depressions thereby to arrange the seed crystals on the template; and bringing the template having the seed crystals arranged thereon into contact with a substrate to transfer the seed crystals onto the substrate; and preparing a substrate, the surface of which has depressions capable of fixing the position and orientation of seed crystal; and placing seed crystals on the substrate, and then applying physical pressure to the seed crystals to insert a portion or the whole of each seed crystal into each of pores defined by the depressions; preparing a template, the surface of which has depressions capable of fixing the position and orientation of seed crystal; and placing seed crystals on the template, and then applying physical pressure to the seed crystals to insert a portion or the whole of each seed crystal into each of pores defined by the depressions thereby to arrange the seed crystals on the template; and bringing the template having the seed crystals arranged thereon into contact with a substrate to transfer the seed crystals onto the substrate; and forming and growing the film from the seed crystals through secondary growth by exposing the arranged seed crystals of step to a seed crystal growth solution containing a structure-directing agent, which induces only secondary growth from the surface of the seed crystals without inducing crystal nucleation in the crystal growth solution or on the seed crystal surface,