To provide a method for duplicating low cost art with an artistic quality of original art with a nonconventional artistic added value, to provide a duplicated artistic article with a new artistic quality, and further to provide a method for selling the duplicated artistic article of sand art with the artistic added value.

In a method for duplicating art added with artistic added value based on original art, a duplicating step of a duplicated artistic article of the original art is carried out by an artist of the original art, or a licenser authorized to duplicate and manage quality control by the artist, or the guidance of the artist or the licenser, the artist or the licenser secures quality of duplicated artistic article.