The invention describes a method and equipment for measuring the similarity. The method for measuring the content similarity between two audio segments includes: first characteristic vectors are extracted from the audio segments, all characteristic values of each first characteristic vector are non-negative and normalized, and the sum of the characteristic values is 1; according to the characteristic vectors, a statistics model used for calculating the content similarity is generated based on Dirichlet distribution; and the content similarity is calculated based on the generated statistics model.