Together with his wife, the painter Agnes Slott-Møller, he was a founding member of Den Frie Udstilling (The Free Exhibition).
After completing the preparatory course at the Royal Danish Academy of Fine Arts (1883), he painted for three years under Peder Severin Krøyer.
A change in style occurred in the early 1890s as can be seen in his portrait of the sculptor Anne Marie Brodersen, in which her fair hair is covered with gold, as are the cornfields in one of his landscapes.
[1] Slott-Møller is remembered for his portraits of well-known figures from Southern Jutland and South Schleswig, often characterized with customized backgrounds such as a landscape or appropriate buildings.
[3] He also worked at the faience factory Aluminia from 1902 to 1906 designing a number of notable items together with Christian Joachim [da].