Abstract： The online newsboy problem with defect rate and delay payment  is studied. Some online ordering strategies for the existence of defect rate and delay payment are presented by using the competitive analysis theory to problem with different risk preference. The results show that these strategies are useful, and the defect rate threshold and delay payments can help the newsboys to make online decision about ordering strategies with the incomplete information. The delay payments make the online newsboys to be risktaking and afford the higher defect rate. At the same time, this kind of delay payments also can help the suppliers to improve the technology and decrease the defect rate.