The development of thin films consisting of metal-organic frameworks( MOFs) crystals depends on aknowledge of the mechanisms of the fabrication processes to control their functions, because the surfacemorphologies, sizes, shapes, and linkage of each crystals of MOFs correlate strongly with their properties. Thisreview presents the conventional approach for preparing MOF crystals in solution phase, recent innovativeprocessing methods for MOF crystal-based thin films, and our approach for selective formation of MOF crystalsat interfaces between reaction solution and solid substrate by using metal ion-doped polymer substrate.