In order to ensure interoperability of basic mobile applications, the Open Mobile Association (OMA ), from the perspective of mobile application, developed the mobile application layer technical standards for technology engines and carried out the interoperability test. From the perspective of fixed Internet, the World Wide Web Consortium (W3C ) developed the technology standard based on basic Web applications, laying the foundation for Web-based mobile Internet applications. There are a number of important technology engines supporting mobile Internet services, including the engine for Internet access and download, the engine for providing status of mobile users and mobile terminals, the engine for community/group administration, the engine for mobile search, and the engine for classification-based content filtering.