With the development and popularization of technology of computer application, network and database, the network based training exam mode has been widely used in place of the traditional exam based on paper-pencil and book ways for it is efficient, fair, safe and reliable. To against the current lack of network test system design, this paper proposes design ideas to dynamically generated answer options of standardized test. Through improving the database design and optimizing test generation algorithm, a network test system with dynamically generated answer options is designed to effectively promote the effect of learning and training of the candidates.