This article uses the Qing Jinshenlu Database to track the career transitions of Banner officials during the late Qing reform period. The institution reform pushed forward by the Qing government in 1906 was their first attempt of modernization. In the existing literature, however, the personnel transition and changes during the reform was understudied. This study tries to apply quantitative method using longitudinal micro-level data to analyze the career changes during the transition period, with a focus on the discussion of the conqueror Manchu officials. We also took the Ministry of Revenue as an example to illustrate the career mobilities of banner officials. By providing the analyzing results, we hope to shed light on the tension between Manchu and Han officials, and also provide a new perspective for the study of late Qing reform in the central government.