Polymers in contact with other materials such as air, water and inorganic materials exhibit peculiar properties, which is closely related to the functions of various industrial polymeric materials. SFG (Sum-Frequency Generation) spectroscopy is a powerful technique for analyzing the functional groups anisotropically oriented at the interface. This paper introduces studies with SFG spectroscopy for polymers/quartz interface, which is a model system for polymer/filler nanocomposite materials and polymer adhesion.