Tiantai County, under Taizhou City, Zhejiang Province. Located in the east and middle of Zhejiang Province, east of Sanmen County, south adjacent to Linhai City, west Pan 'an County, north even Xinchang County, northeast bordering Ninghai County, southwest near Xianju County, a total area of 1431.66 square kilometers. In 2021, Tiantai County has a registered population of 598,800, with 30 ethnic minorities in addition to Han. As of October 2021, Tiantai County has jurisdiction over 3 subdistricts, 7 towns and 5 townships. The county government is located at No.1 Yulong Road, Shifeng Subdistrict.

Three Kingdoms, analysis of Zhang 'an County set the beginning of Ping County. Jin Yong and three years (347 years), analysis of the south Township set Le 'an County (Xianju County). In 1970, it was renamed Taizhou Area. In 1994, it was renamed Taizhou City, which belongs to the rooftop. It is famous for its Buddhist origin and scenic beauty. It is the birthplace of the Buddhist Tiantai Sect and the founding place of the Taoist South Sect. It is the national sanitary County, national Ecological County, National Ecological Tourism Area, National Sanitary City, home of Chinese tea culture, home of national Weiqi, home of Chinese black medicine, home of Chinese famous tea, home of Chinese tea culture, and national key tea producing county. As one of the earliest tea producing places in China, it is the source of the "Sea Road of Chinese Tea" and known as the "source of tea in South China and the ancestor of tea in South Korea and Japan". There are four national intangible cultural heritage lists, 15 provincial ones, 49 municipal ones and 135 county-level ones. One national insurance unit, 12 provincial insurance units, 42 county insurance units, a total of 55.

In 2021, the GDP of Tiantai County was 33.955 billion yuan, an increase of 9.8% at comparable prices. The added value of the primary industry was 1.612 billion yuan, and that of the secondary industry was 13.752 billion yuan; The added value of tertiary industry was 18.591 billion yuan, and the proportion of tertiary industry was 4.7:40.5:54.8.