Imperial Family
Imperial Household
noun
The emperor's room is where the Imperial Family gathers.
Note that 皇室 refers to the Imperial Household as a family unit, rather than a physical space.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
皇室はここ最近、かなり大変な状況に陥っています。
The Imperial household has been going through a very difficult time lately.