As a state museum, it houses a large collection of Kedah's historical, culture, and royal heritages.
The museum outlines the early history of Klang to its present state, with display of ethnographic materials and photographs.
Collections/ Displays include ethnographical, archaeological, natural history, local history and archival materials. Temporary exhibitions at interval.
Among the items on the display are special collections found in Borneo such as skeletons of mammals, invertebrates, reptiles, birds, inserts, fishes and shells which have all been conserved.
Collections/ Displays include police weapons, paraphernalias, lock ups, gambling equipments and weapons confiscated from gangsters.