In order to develop the cluster products for Chinese new generation op erational Ensemble Prediction System (EPS), the cluster analysis techniques for EPS used in foreign developed country are introduced, and the Ward analysis is a pplied to interpret the products of Chinese EPS. The case study for operational application capacity of Chinese EPS cluster products indicates that the Ward ana lysis can classify the circulation situation efficiently, and the cluster produc ts are very helpful and convenient for the weather forecaster to make use of the EPS information.