Abstract: With increasing market competition, enterprises have come to realize the importance of achieving profit by cross-selling services to existing customers. In this study, the author investigates customers’ demographic data, studies how to quantify purchasing behavior and sets up mathematical method to calculate customers’ cross-selling capability. Then, the model of customer cross-selling capability is set up based on counter propagation network, from which we can predict customers’ cross-selling capability according to customers’ demographics data---gender, age, educational level and income. The model will show us which products the customers should purchase. The predicting result from the model provides support for enterprise to evaluate customers’ value and gives help to draw up the following targeted marketing strategy. At the same time, the author also points out the limitations of the research and lays out some directions for future research.