According to the key word to search the information many search engine which the customer is need it, and returned a lot of information to customer. Moreover the invalid link is contained.The customer needs to cost a great deal of time and energy to search the useful information, and producing impatient motion in the process . They will re-searching with new keyword. Because of this characters about search engine, retrial times as virtual customers is considered, invalid link as negative customers, and research one customer arrival at system.