Low Carbon Entropy is an indicator that measures competitive ability in low carbon society. Usually, the businesses often announce the low carbon performance but it cost much more resources in the whole process actually. It is necessary to set up a indicator or a standard to measure low carbon practice.

The concept of entropy can be described qualitatively as a measure of energy dispersal at a specific temperature. It is possible (in a thermal context) to regard entropy as an indicator or measure of the effectiveness or usefulness of a particular quantity of energy in process of working.

  So we can use Low Carbon Entropy to measure the effectiveness in low carbon practice. Further more, we can measure the effectiveness with low carbon entropy as an indicator in low carbon business practice. Low carbon entropy in statistics is the ration of cost in low carbon practice to the net profit that such practice archived, so the higher of the value of low carbon entropy, the lower of effect of the input converting into low carbon productivity.