At the beginning of Rattanakosin era which was governed by King Nangklaochaoyuhua, Phayao was occupied by Lampang and Lampang’s ruler let his family members to governed Phayao until King Chulachomklaochaoyuhua reign, the king was restructure the administration system then Phayao was been the cities in Lao Chiang precinct (Phayap as later). That restructuring applied centric administrative system that made the trend of against from all existing rulers and beneficiaries (also known as “Rebel Rattanakosin era 112”). After completely the administrative system adjustment, Phayao was established as a Phayao area province that was abased into only a district of Phayao in 1905 which has Chaoaupparat Mahachaiseetisarn acted as Phayao’s ruler. Since 1909 to 1977, those 63 years with 25 sheriffs governed until August 20, 1977, Phayao district was promoted to be the 72th province of Thailand until now.