After joining the World Trade Organization (WTO) , Vietnam economy has a lot of opportunities for to develop and integrate into the regional and global economic. However, domestic enterprises have also confronted with many difficulties and challenges in the context of increasingly fierce competition, particularly in the service sector. With the goal of providing accounting information to support managers in decision making, accounting information systems are increasingly important in creating a competitive advantage for enterprises. Accounting software is a tool that helps in collecting, processing and delivering information more quickly, timely and accurately. The research did conduct an actual survey by making questionnaires at services enterprises in Hanoi, Hai Phong, Ho Chi Minh city to consider whether or not there is the relationship between the application of accounting software and the usefulness of accounting information system in providing information. Thence, it shows clearly the importance of accounting information systems in providing useful information, improving the efficiency of management decisions in the context of integration.