With the improvement of living standards, the public has also begun to pay increasing attention to the ecological environment, and the recycle of abandoned factories has received more attention. As the global economy continues to develop, the recycle of idle space in abandoned factories has become a hot topic worldwide. This paper first defines the concept of reutilizing idle spaces. Then, it analyzes the development history of Hanyang Iron factory using data organization and historical review methods, conducts on-site research on the current situation of idle spaces within Hanyang Steel Factory, and analyzes the necessity of their renovation. It further dividing the idle spaces within the area into internal and external architectural spaces of the buildings and provides a detailed description. Next, the paper uses a comparative analysis method to examine renovation case studies such as the "F1963 in Korea", "Beijing 798 Art Zone", and "Duisburg in Germany", It combines the renovation principles and strategies with the current status and characteristics of the buildings within the area to propose principles and strategies for the renovation of both internal and external spaces of the abandoned factory. Finally, utilizing these renovation principles and strategies, combined with the characteristics of the idle spaces in Hanyang, the internal spaces of the Hanyang buildings are divided into "Large-span", "Conventional type", and "Unique type", and categorizing the external spaces as original idle spaces and idle spaces with existing structures. It provides Detailed analysis is conducted based on these classifications and derives the effects of iconic buildings after post-renovation This study follows a sustainable ecological design approach for the reuse of abandoned industrial buildings, and utilization of abandoned factory buildings, based on excavating and renovating internal and external spaces within the whole environment. By Considering the urban characteristics, historical culture, surrounding environment, and social needs, it achieves a transformation to comprehensive space through space reconstruction and function integration, endowing the area with vitality and economic value. The aims is to provide a reference for the reuse of idle spaces and utilization of idle spaces in many solid-type abandoned factories in many cities in our country.