Moo Duk Kwan is the name of a martial art organization founded by Hwang Kee in South Korea in 1945.

Tang Soo Do Moo Duk Kwan translates to “the brotherhood and school of stopping inner and outer conflict and developing virtue according to the way of the worthy hand” As a child, Hwang Kee witnessed a man using Taekyon to defend himself against a large group.

Traveling between Manchuria and Korea during World War II, Hwang later successfully appealed to Chinese martial arts teacher Yang Kuk Jin for training, fusing together Chinese and Korean martial arts into a form he initially called Hwa Soo Do ("the Way of the Flowering Hand"), altering to Tang Soo Do after the November 9, 1945 opening of a training hall proved unsuccessful.

Hwang Kee further expanded his Moo Duk Kwan school of martial arts after in 1957 he was introduced to the Muye Dobo Tongji by a librarian at the Korean National University in Seoul.

His appointment was approved unanimously by the Board of Directors of the United States Soo Bahk Do Moo Duk Kwan Federation, Inc. as well as other chapters through the world.