E-government aims at providing small & medium-sized enterprises with easy access for information and services on policies, regulations, management and technologies, and facilitating the enterprises' communication with the government, social intermediate organization and agencies. The Guidance System for Practical Affairs, one of the service application functions, aims at providing convenience for enterprises, and provides small & medium-sized enterprises at different stages of development (such as start-up, registration, operation, and exit) with various services according to their specific demands, and thus enables them to deal with their own operation through the service platform; this Guidance System, in this sense, offers a real one-stop service.