1977 | Penang Museum and Art Gallery
1982 | Sri Batik Restaurant Art Gallery
1991 | The Art Gallery, Penang
- In 1975, Ong Soo Keat was invited to participate in the London Group Exhibition of Paintings of Endangered Species in Tryon Gallery, London.
- His paintings were also used for Malaysian Postal Stamps Design in 1979, 1987,1988, 1990 and 1993.
2014 June| Masterpiece Malaysia| Oil on canvas ( 76cm x 76cm)