In the paper, we propose a multi-aspect data mining process for investigating a more whole human information process mechanism systematically. As an example to demonstrate the proposed mining process, we explain how to design the experiment of an ERP mental arithmetic task with visual and auditory stimuli, and describe how to do multi-aspect analysis in the obtained ERP data, respectively. Furthermore, we give some preliminary results to show the usefulness of our methodology and to discuss the future research directions. The proposed methodology attempts to change the perspective of cognitive scientists from a single type of experimental data analysis towards a holistic view at a long-term, global field of vision.