With the development of economic globalization,English has been accorded paramount importance.Today,English is the most widely used language in the world and is one of the most important information vehicles.Also the Internet has unveiled a new era of mass communication in human history and its development has great effect on English.This article presents the effect that Internet brought on English development from different aspects and analyzes the reasons why these changes have taken place.Also this essay provides the benefits and challenges of Internet for second and foreign language acquisition.