Google search technology by relying on software that can simultaneously conduct a series of operations, and only a few moments to complete all operations. The traditional text search engine depends largely on the frequency appears on the page. Google uses PageRank? Technical examination of the entire link structure, and determine which pages are most important.Then hypertext-matching analysis to determine which pages are relevant to the specific search. After considering the overall importance and query-specific relevance after, Google can be the most reliable and most relevant search results first.