The environmental response of the fluorine-conanining amphoteric copolymer in water and air has been investigated. The polymers were coated on slide glass by spincoater. The surface composition was determined by Angle Resolved X-ray Photoelectron Spectroscopy(ARXPS). Sessile-drop and captive-bubble techniques were used for contact angle measurements. Advancing contact angle was increased by increment of fluorine content. Octane contact angle in water increased with decreasing advancing contact angle in air. Octane contact angle in water was strongly affected by dispersion term in surface free energy.