A web-based service to facilitate learning of artwork is presented. The service is based on the idea of “Active Knowledge (AK)”, a format of knowledge that prompts its active reuse and creation of new knowledge. Using this service, users can study artworks through data prepared in AK format and create new knowledge by adding their own findings, impressions and comments. In the paper, details of
... [Show full abstract] the AK format and functions of the service and their relation to the learning process are presented. Especially, the service is oriented to life-long learning by adults regardless of their interests in art and also to art education for children.