Htay Aung was born in 1955, in Today. He educated at the High School of Tontay. He attended the Yangon state School of Fine Art in Yangon for three years and got a special certificate in 1973. His teachers were U Thu Kha, U Ba Lone Galay, U Thein Han etc.
After getting certificate, he studied poster painting under U Aung Myint, U Chit Swe, U Kyaw Nyunt and U Maung Maung. Between 1975 to 1980, he painted posters. Between 1980 to 2000, he painted film poster under the name Bagyi Htay Aung and Group for the downtown Cinemas. Between 1994 to 2012, he served as the educational officer of Myanmar Panyoeyer Artists (Baho). Between 1996 to 1998, he painted wall paintings in Shweli, China. In 2001, he painted in the Gem Museum of Mila, Shan State. Between 2007 to 2009, he painted the life story of the Lord Buddha in Global Pagoda, in Mumbai, India. From 1980 to this day he has participated in many group shows.