The purpose of this research is to clarify the building engineer of the Public Colliery Company in Hokkaido, from 1878 to 1889. There are three points in this paper. (1)The brain of technologists were the hired foreigners who were the American and the Dutch, and the Japanese who had studied abroad in early the era of Meiji. (2)The transition of building engineers is distinguished three terms. In the second term(from 1881 to 1885), the main technologists were Soichiro Matsumoto and Seijiro Hirai who were a graduate of Rensselaer Polytechnic Institute in the U.S.A. (3)Comparing the Public Colliery Company with the,Building and Repairs Office of the Kobusho and the Industry Office of Sapporo, about the post and the salary, Matsumoto and Hirai had received hospitable treatment.
