Fabrication of functional materials through self-assembly and coordination chemistry at interface becomes hot topics in recent research activities. However, supramolecular chemistry at interface including molecular recognition and self-assembly has fundamental meanings in understanding of biological events and investigation on functions of organic materials. In this account, various aspects in supramolecular chemistry are briefly introduced from origin to future. For example, molecular recognition efficiency at interfaces are incredibly enhanced as compared with those observed in bulk aqueous solutions. It would be a key to understand several mysteries in biological systems. In addition, interfacial environments as confined interfacial media offer opportunities for formation of complicated receptor sites and precisely controlled nanostructures. As another view point, twodimensional systems can bridge macroscopic actions and nano-level functions. For example, controls of molecular machines with incredible functions such as capture and release of desired molecules can be done through hand-motion-like macroscopic mechanical motions. Furthermore, tuning-type molecular recognition as a new mode of molecular recognition has been proposed. The latter characteristics would open a new methodology to explore hidden functions of organic molecules through soft manipulations.