Abstract:With the development of Internet technology, the Intelligent Answering also has drown more attention, because it can solve user unsure questions timely. Intelligent Answering system typically includes comprehension questions, information retrieval and answer extraction and selection. Sentence Similarity Computation is a part of comprehension questions, which directly affects the accuracy of the final answers. This is based on the morphological pattern and improved edit-distance method, adding semantic information of words and taking weight into account to the new sentence similarity method in. And Intelligent Answering is implemented, to make the correct rate of the system greatly improved.