Succeeding the Kharchin Tumet,one of the Mongol Right-Hand three Tumens,the Guihua 歸化 City Tumet disintegrated and submitted to Qing Dynasty during the process of Ligdan Khan’s westward migration as well.In the submission of Tumet to Qing Dynasty,a Chaqar Lama named as Erdeni Nangsu played a special role.Based on previous academic achievement,the article analyzes Emperor’s Order(Chiwen 敕文)of giving reputation to Lama Erdeni Nangsu,which is kept among Mongolian archives in the Secretary of Administration Department(Nei Mishuyuan 內秘書院)from early Qing dynasty,as well as other Manchu archives and historical records,and studies the historical facts of summoning Tumet Tribe to surrender with the order of Huang Taiji,development of trade with Ming count in Shahukou 殺虎口,and organization of banner administration,and further explores issues such as giving reputation to officials of Tumet in Guihua city from Qing court,composition and number of officials in Tumet two banners.