This paper, based on a case study on Shanxi-Shaanxi-Inner Mongolia (JSM) energy concentrating area, establishes an input output model which is used to study its hidden carbon emission transfer in their trading, calculates their carbon emission transfer volume in each province to other regions and their mutual transfer volume, aiming at offering reference for clarifying responsibilities in carbon emission reduction. The transferred carbon dioxide volume from other regions to JSM is higher than that from JSM to other regions, meaning JSM partially bears carbon emission pressure from other regions, mostly concentrating on coal mining and beneficiation, petroleum, coking and nuclear fuel processing. Inside JSM, their transferred volumes relatively close. JSM provides large quantity of high-energy-consuming and high-carbon-emission products to other regions by means of its abundant energy resources, and can provide energy consumption for itself, only needing a few from outside to satisfy the diversity. This paper suggests making regional collaborative emission reduction policy and taking reasonable responsibilities in order to promote low carbon development.