The paper mainly focused attention on how to mine opinion topic from online subjective text set,and identified the orientation of these opinion topics.It combined the heuristic rule and co-occurrence probability to identify area noun phrase,and adopted Latent Dirichlet Allocationn（LDA）to obtain local opinion topic.Then,it computed the sentence orientation with a method of multiple features fusion,and obtained the opinion topic orientation by adding up the number of each orientation of the sentences belonging to the specified topic.Experimental results show that ...
