Wikipedia is a typical application in Web2.0 environment. It is a free, web-based, multilingual encyclopedia which is written collaboratively by largely anonymous. Usually, I use it as a kind of reference book, encyclopedia. Sometimes, it is also being treated as a writing samples database for English learner. A lot of people choose Wikipedia because of its high-quality content. Some academic institutions, however, do not recommend Wikipedia as a sort of research recourse, especially in term of articles about history. In fact, the figures from Nature and First Monday show us that Wikipedia does a good job in information diversity, reliability and accuracy.