Utilization of the network gradually enhanced in recent years, enabling consumers to try online shopping, makes the online traditional is more and more important. For understanding the impact of online auction consumer purchase intention factors, this study proposes a model to explore the website trust, seller trust, perceived value to the purchase intention of online auction consumer. This research uses questionnaires to investigate consumers' usage attitude and purchase intention. The structural equation modeling (SEM) technique will be managed to confirm the proposed model. The results are expected to provide solid recommendations to related vendors. This study found that perceived risk negative affects purchase intention and the website trust affects the purchase intention insignificantly. Perceived value and seller trust have positive significant relationships on purchase intention of online auction site.