Hsi-Yu Chi is one of the most well-known adventurous journey novels and the space is one of the major structures in Hsi-Yu Chi. The journey design in space structure has been received much attention, however, other important aspects such as, allocations, correlations and functions in space structure are usually neglected. In this paper, the allocations, correlations and functions in space structures are investigated and analyzed in detail from the individual and entire aspects. Based on the above analysis, furthermore, the paper further discusses the characterizations of the space structures and underlying narrative meaning. It is thus pointed out that Hsi-Yu Chi is a significant fiction of spiritual practice. The paper mainly combines two theories for the analysis: the space concept of narrative theory by Meike Bal and the time-space body of formalism by Bachking. Meanwhile, historical occurrence method is used to compare Hsi-Yu Chi with other forms of the west journey stories in different dynasties. From the comparison, it can be found that Hsi-Yu Chi has successfully opened up an innovative narrative space with more spectacular and diversity than its predecessors.