online examination is an effective solution to the level evaluation problem for computer basic operations. This paper proposed an online examination system for computer basic operations, especially, Microsoft Office software operations. The system mainly achieved functions including making exams intelligently, collecting and marking documents submitted automatically in the exam by the database, socket, ado and VBA program methods. This system supported some kinds of Microsoft Office software including Word, Excel, PowerPoint and Access. The actual running result showed the system could help teachers to improve work efficiency and students to improve software operations by the way of online actual operation in computers. The system has been running in the USTL university computer lab center for some times which has already proved that it was very valid to solve level evaluation problem for Microsoft Office software operations.