The Roaring Sky Dog is a mythical beast/magic weapon beside Erlang God in Chinese mythology. It assists him in hunting, charging, and slaying demons. The prototype is a white short-haired dog. It first appeared in "Journey to the West" and was a hound raised by Erlang God for hunting. But there is no name. He fought against Sun Wukong (Monkey King) in Journey to the West, and also appeared in The Romance of the Gods and other related works about Erlang Shen such as the Lotus Lantern. The name "Howling Sky Dog" first appeared in Qian Bao's "Sou Shen Ji".

There is also the roaring dog, commonly known as "Tiangu" among the people. In ancient times, science and technology were not developed, and people thought that solar and lunar eclipses were It is the Tengu who is causing trouble. In ancient times, when there was a solar or lunar eclipse, people had the custom of beating gongs and drums to drive away the Tengu. There is still a common saying that "the Tengu eats the moon".