The 1,500-year-old Hanging Temple is an important historic site in the county.

[citation needed] During the Spring and Autumn period of Chinese history, present-day Hunyuan County formed part of the Baidi state of Dai[1][2] to the north of the Zhou Kingdom.

[3] Pingshu was later merged with Guo County, which was placed in Hengshan Commandery.

During the Jianwu era of the Eastern Han, Guo County was renamed.

This was changed to Guoshan County by the Northern Wei, who placed it under the administration of Si Prefecture.