Oddy test is the most widely used corrosion test which can assess the suitability of a storage or display material in museum.The disadvantage of Oddy test is the employment of lowactive metal sheet coupon which cause the long term test period,and the distortion of metal coupons or man's subjectivity may lead an inaccurate result.A substitute silver nanofilm coupon is discussed here to substitute the metal coupins.The thin film coupon uses 10 mm radius glass wafer as matrix and the thickness of the silver film is about 200～220 nm.The results show that the phenomena of corrosion are completely displayed and differentiates after 14 days and basically remains the same to 28 days,the original test period.Digital acquisition technology is also introduced to benefit the further research in digital analysis of corrosion phenomenon for the achievement of external and accurate results.