In this study, a concept of \¡ÉAffective Interface\¡É was introduced to promote risk communication for geological disposal of high level radioactive waste (HLW) and a web system was developed according to the concept. Then the web system opened to the public in order to promote them to understand the importance of the plan for HLW disposal, and the effectiveness of the web system was evaluated by the analysis of access and the result of questionnaires.