Sinwonsa is located in Yanghwari Gyeryong-myeon Gongju, and one of three main temples in Gyeryong mountain along with Donghaksa and Gapsa.

The temple was built by the monk Bodeokhwasang in the 11th year (651) of King Uija's reign of Baekje, and underwent several expansions.

The religious service for the god of Gyeryong mountain was performed every spring and autumn.

In the late Joseon Dynasty, Muhak was mid-sized, and Yeongwonjeon was built.

Among the four temples in the east, west, north and south of Gyeryongsan, it belongs to Namsa, and the existing Dangwoo include Daeungjeon, Hyanggak, Yeongwonjeon, Daebang, and Yosaechae.