This paper is the second report of a series of research on the transition of the official residence of Japanese National Railways. In this paper, we especially clarify transitions of the official residence in around 1900. The result can be summarized as follows :<br>1. For Japanese National Railways, the time of around 1900 is one of turning points. The establishment is reorganized corresponding to rapid extension to the whole country of a railroad. The organization is made centralization. Various technical standards begin to be provided, too.<br>2.If we focus on floor planning of the official residence, we can see two kinds of changes. One is the reconsideration of the relation between the floor planning and the classes. The chance of extension or rebuilding of residences makes this visible. And the other is application of certain floor plan in some places where the jurisdictional district is exceeded, although we can see only one example.<br>3.It is possible to say that previous two kinds of changes are the germ of a new stage of the official residence. But these were not consistent in the entire organization necessarily. We can see the floor planning of the official residence is kept studying in each place as well as previous age, too.