At the very beginning Yao seeks to make clear the purpose and meaning of such art with the following definition: "In general terms installation art refers to an expressive method not a style. In the main it focuses on artistic behavior or approaches undertaken in a physical or conceptual space.
書中他開宗明義指出：「裝置是泛指一種手法而非風格，主要是針對一個實存空間或概念空間所進行的藝術行為與手段。