The application of carbon isotope (delta~(13) C) collected from stalagmite to reconstruct the past climate and / or ecologic evolution,relative to other preserved indicators,is much limited due to its complex influencing factors including climate outside cave and complicated and site-specific karstic process. In terms of various climate and non-climate limiting factors on stalagmite delta~(13)C,and combined with a large number of geological records and modern cave monitoring data of the latest researches,the pathway and behavior of the signal transmission of delta~(13)C in the cave system were analyzed. The possible relationship between delta~(13)C excursions and climate oscillations under different time scales was thus discussed. Although the degree of noise becomes increasing mixed with delta~(13) C on centennial scales or shorter,the climatic elements,such as temperature and humidity (or precipitation),as predominant modulators exert directly or indirectly influence on vegetation overlying the soil and associated soil CO_2 productivity on millennial-orbital scales. Future work should be focused on further deeply extracting the common delta~(13)C signals from specific caves by exploring the controlling factors,both including climatic and non-climatic ones,attaching importance to the seasonal characteristics of stalagmite delta~(13)C,and taking full advantage of its potential in the indication of local environmental events. The use of multi-proxy and multi-method will contribute to better understanding the interesting linkages among the delta~(13) C characteristics,karstic process,global carbon cycle and associated climate change.