九曜堂是高丽王朝最早设立的道教机构，它既是一座道教殿宇，同时还是高丽官制中的一个官署。高丽共有三座九曜堂，除了立国初期在京城设立的九曜堂之外，高宗十九年至元宗十一年，高丽王朝为躲避蒙古入侵迁都江华岛，在江华还设立了两座九曜堂。九曜堂是高丽王室举行道教斋醮的重地，负责为国家和王室祈福禳灾。九曜堂的斋醮以醮星为主，其醮星活动继承了新罗的祭星传统，同时又受到中国道教星辰信仰的影响。
Jiuyaotang was the first Taoist organisation established in the Goryo Dynasty.More than a mere Taoist temple，it was also an administrative agency in the bureaucracy of the Goryo Dynasty.There were three Jiuyaotang.Apart from the one built in the capital city in the beginning of the regime，from the Nineteenth Year of Gaozong to the Eleventh Year of Yuanzong （AD 1232 to 1270），the imperial court，in an attempt to escape the invasion by the Mongols，moved its capital to the Jianghua Island，where two other Jiuyaotang were built.Jiuyaotang was the key venue for the royal family to carry out Taoist fasting rituals，responsible for praying for blessings and disaster prevention/mitigation for the whole nation in general and the royal court in particular.The fasting ritual at Jiuyaotang was focused on the Jiao Star，which as an activity was a continuation from the Silla's tradition of star worship.It was also influenced by the practice of star veneration in Chinese Taoism.
