Online scoring system is one of important components in the examination system. The development of modern education technology has not only promoted the changes of examination pattern, but also the scoring pattern. This paper discusses the functions that the scoring system should have and provides the way how to design and implement the system. The system can adapt to scoring the online papers which is provided by the online examination system. And the traditional papers can use the system to score online, too. Moreover, the system can treat no matter the standard sheet or the non-standard sheet. Practical application shows that the system is satisfied with the requirement of network scoring papers well.