Online group-buying is more and more popular, and under the trend, more and more group-buying websites are established. We all know the every website has different strategy--some offer special service, some offer special discount, and some offer special goods. And which one is much better? On the other hand, what kind of customer will shop via the group-buying websites? If the online-buying experience affect the behavior? The purpose of the research is to analysis the different strategies among the online group-buying platform. Besides, the research also tries to find if the different using experiences from these platforms will differ the group-buying behavior. The research result indicates that the group-buying websites which offer price discounts and purchasing-related service are easy to get better performance. And the friendly operating instructions could lower the resistance for customers to join into the websites.