Started career researching one of Sweden's most famous authors, August Strindberg, then moved on to popular fiction and subsequently to children's and youth fiction. One of the leaders of a major research project on Youth Culture in Sweden during the first half of the 1990s.
Leader of a project on Children's Literature and Modernism, and editor of the book Modernity, Modernism and Children's Literature (1998). Author of a large number of essays, including one on Astrid Lindgren's Emil entitled Konsten att göra sig rolig (The Art of Making Fun of Oneself, 1990).
Has served as a board member at the Swedish Institute for Children's Books (SBI), the Centre for the Study of Children's Culture, and the Swedish Humanities & Social Sciences Research Council's youth research group. Previously also a board member at the Swedish Centre for Popular Culture and the Swedish Adult Education Research Council (Mimer). Member of the editorial board of the children's books journal Barnboken.
Ulf Boëthius has five children, three grandchildren and one great-grandchild.