The customization degree reflects the level of the manufacturer response to the customer individual requirements. The measuring model of attribute customization preference based on utility and that of customization degree based on attribute importance are established by using conjoint analysis. In research of laptop computer assembly customization, the customers sample is divided into five different attribute preference groups using K means, the satisfaction degree of individual and five attribute preference groups are measured and the diversity of satisfaction degree between diversified production mode and customization mode are comparatively analyzed, and the regression equation is set up, which describes the relationship between customization degree of different preferences groups and customer satisfaction. The results show that customization production in accordance with customization attribute importance can increase the customer’s satisfaction much more effectively than market segments production mode.