This topic belongs to the field of house renovation and reinforcement, focusing on the research on old housing renovation methods and equipment and facilities renovation technology in old communities. 1. Through a large amount of research and literature summary, this topic puts forward the definition methods and standards for old houses and old communities for the first time, summarizes the current situation of old houses and old communities in Shanghai City, and points out the development direction of renovation and the main existing problems. 2. This topic analyzes and studies the renovation methods of old houses and the renovation of equipment and facilities in old communities. On this basis, the basic principles, basic contents and influencing factors of the renovation methods of old houses and the renovation of equipment and facilities in old communities are summarized for the first time. 3. This topic collects a large number of engineering cases of the renovation of old houses and old communities, analyzes the cases, and provides a basis for decision-making. 4. This topic uses the analytic hierarchy process to carry out a weight analysis of the factors that influence the renovation of old houses and old communities. Based on the classification of various factors, mathematical models are used to carry out calculation and analysis to comprehensively evaluate the level of old houses and old communities. Determine whether renovation is needed and what method to use to carry out the renovation based on the level. 5. The decision-making model for old houses and old communities proposed in this topic uses a combination of qualitative and quantitative methods to determine the actual use status of equipment and facilities in old houses and old communities, providing technical support for scientific decision-making on old houses and old communities. Engineering case analysis shows that the analysis method proposed in this topic can be well applied to engineering practice and has good results. 6. The research results of the project provide a scientific basis for government departments to make decisions and have important guiding significance for the future renovation of old areas.