Abstract: The stone relic is a kind of cultural heritage of mankind society. Many stone relics are suffering serious erosion of weathering that has been acting on for a long time. Inspection and assessment on the weathering degrees of stone relics has become an urgent task in the protection of stone relics. The feasibility and approach of the ultrasonic transmission wave and Rayleigh Wave to the inspection on the weathering degrees of stone relics are discussed theoretically and practically. What is also displayed in this paper is the application effect of the two methods in the inspection on the weathering degrees of an ancient stone bridge in Yiwu of Zhejiang Province, a marble fence in the Forbidden City in Beijing, and drum-holding stones beside a gate in the Xihuang Temple.