With the gradual progress of information technology, people become much more easier to create, store and disseminate information in electronic form. Billions of users on Internet create quintillion of bytes everyday, even though the rich information is beneficial for human beings on several levels, the amount of information and knowledge are growing exponentially, which makes people difficult of find useful information. Taking into account the efficiency of information utilization, a viable solution for getting critical information from a large collection of document is to generate readable and concise summaries containing the most relevant information automatically. Automatic summary may collect the most relevant facts and common views in several sentences, avoiding getting lost in the large set of original tests.