Cheondoism is a 20th-century Korean pantheistic religion, based on the 19th-century Donghak religious movement founded by Choe Je-u and codified under Son Byong-hi. Cheondoism has its origins in the peasant rebellions which arose starting in 1812 during the Joseon.

Pantheism is the philosophical religious belief that reality, the universe, and nature are identical to divinity or a supreme entity. The physical universe is thus understood as an immanent deity, still expanding and creating, which has existed since the beginning of time. The term pantheist designates one who holds both that everything constitutes a unity and that this unity is divine, consisting of an all-encompassing, manifested god or goddess. All astronomical objects are thence viewed as parts of a sole deity.