Abstract
This article is in order to research the consumer loyalty in retail industry by analyzing the member consumption data. Promotion is regarded as a main factor that will affect the member’s loyalty. So the main objective in this article is to see if promotion is a main factor that will affect member’s loyalty in retail industry. First, in the observation duration, in terms of the primary behavior index that is published by Jones and Sasser（1995）and the concept of RFM model that is published by Hughes（1994）to analyze the behavior loyalty. And then using the SAS statistic tool to analyze the consumption data. And then the relationship between attitude loyalty and behavior loyalty is analyzed by questionnaire. There are two dimensions in this questionnaire that is also published by Jones and Sasser（1995）: intent to repurchase and secondary behavior.