Fine design for inner space is an important way of saving the size of dwelling and improving the quality of the space. As a residential type for urban low-income groups, indemnificatory housing is equipped with the same functional space as general residential; however, it has different standards from the ones set in the norms of residential design for general residential. This paper, in terms of the functions and characteristics of the space, as well as the arrangement forms of furniture, analyzes the minimum area of each functional space in the perspective of ergonomics. Then the reference value for the area is illustrated. Finally, it demonstrates the space complex strategies applied in the indemnificatory housing from the two-dimensional and three-dimensional perspective.