The museum's mission is to preserve and share the rich history of the great Raja Family of Sylhet keeping the Zamindar and Mystic poet Dewan Hason Raja Chowdhury (1854–1922) in the center, and the folk literature, folk music and mystic poets of Sylhet Division.

The museum promotes a greater public awareness of the rich cultural legacy of Sylhet.

In pursuit of these goals, this museum collects archival materials related to Bangla folk literature, music and poets from the greater Sylhet region, and preserves these collections in a repository, open to the public.

[1] 'Raja-Kunjo' is a hundred years old tin shade building having few rooms and other amenities including a piazza in the front.

There are four big showcases containing the items related to Dewan Hason Raja and his family members, huge and rare collection of folk musical instruments, artifacts of Hason Raja movie (recipient of the best movie award 2002) and various folk and mystic poets.