We propose a new model, which is called the action-demographic interconnection model which realizes an interconnection function between customer actions and their customer demographic attribution. The features of our method are a semantic-dependent web access log analysis for predicting customer attribution. Our method makes predictions from a web access log. Therefore, we can determine what kind of customers are accessing each website. We present experiments for effectiveness with real advertising web access logs. Based on the results of the experiments, we discuss the possibility and the practicability of our proposed model.