The construction of Meiji Kyuden (the Imperial Palace) was commenced in 1883 and completed in 1888. The Bureau of the Imperial Palace Construction was the largest system of constructions in Meiji Era which was set up in 1882 and employed many engineers. These engineers were constituted writh the engineers of the Department of Public Works and the Imperial Household Agency and the other office. This paper describes on the change of the organigaation, the number of engineers, their past record, their careers in the construction works and considers on the significance which the Imperial Palace Construction had in the process of the development of Meiji Era's architectures.