In 314 BC, Juren County (朐忍县) was established in Qin state. In 568 AD, the county seat was moved to the site of modern Yunyang Town, and the county was renamed Yun'an (云安县).
The territory that is now Juren County was established in 314 BC within the boundaries of the Qin state. Later, in 568 AD, the administrative center of the county was shifted to its current location, which is now known as Yunyang Town, and it was subsequently renamed Yun'an County.