The Hsi-men market is a milestone of urban historical spaces in Taiwan. Hoverer, its achievement and public participation had obviously caused a tremendous gap. To explore the facts of this situation is my research motivation. This case involved not only many historical subjects but also the benefits of the tenants who rent stalls in the space. The study chose interview method to collect some key members’ opinions and to recover the original facts of the case in detail. By assembling every event of this case and finding out the factors that led to the result were the main purposes of the study. The study aim is to analyze the factors that affect the defeat and mediation of the case. The research classifies the factors into two categories: visible and invisible factors. The visible factors include the opinions of historical preservation experts, public sectors, the tenants, and the architects, and the invisible factors include social context, political operation, and the case itself.