Currently, Taiwan has a considerable number of old houses, with 50.44% of the country’s houses being over 30 years old. Specifically, in Taipei City, there are 26,857 houses with an age of 30 years or below, while the number of houses over 30 years old reaches 201,953. To promote the “Construction of the Digital City Development Foundation” strategy, this study adopts electronic means to re-create blueprints of old buildings, digitizing the operational management data of the buildings. By integrating relevant professional knowledge and introducing BIM technology, the study utilizes digital technology to reconstruct building information models for application in building maintenance management. The platform not only integrates various monitoring devices in buildings but also incorporates functions such as monitoring operations, monitoring seismic structural displacement, warning of abnormal electromechanical equipment, and automatic dispatch of repairs. The system not only includes basic functions such as operational budget and energy efficiency statistics but also adds value by improving data completeness, information relevance, and achieving information standardization and visualization. Additionally, it possesses functions like operational prediction, optimization management technology, and graphical output, aiming to achieve the goal of digital smart management.