熵值法是一种客观赋权法。在信息论中，熵是对不确定性的一种度量。信息量越大，不确定性就越小，熵也就越小。反之，信息量越小，不确定性越大，熵也越大。利用熵值法确定指标权重，在一定程度上，避免了主观的随意性。-Entropy method is a kind of objective empowerment method.In information theory, entropy is a measure of uncertainty.The smaller the amount of information, the greater the uncertainty, and the smaller the entropy.On the contrary, the smaller the amount of information, the greater the uncertainty, the greater the entropy.Entropy value method is used to determine the index weight, to a certain extent, to avoid the subjective randomness.