Supramolecular interactions are intermolecular actions with molecular recognition ability, that is, Vander Waals force, electrostatic action, hydrogen-binding, dipole-dipole, charge transfer and hydrophobic action based on synergistic stereochemistry effect. Molecular recognition is the selective inclusion complexation between host and guest, in which some special functions can be realized. It is the base of biological recognition, such as enzyme catalysis, nucleic acid duplicate, antigen and antibody, drug...