Female-friendly public spaces are crucial for the sustainable development of old residential communities. To advance the development of female-friendly public spaces in Beijing’s old residential communities, this study employs a method that integrates the Kano model with an importance–performance analysis. The research focuses on the public spaces of Baiwanzhuang in Beijing, specifically targeting female users. Field research, including interviews and surveys, is conducted to understand women’s needs in these spaces. Based on this, an evaluation index system is developed, and data from questionnaires distributed to women are analyzed using the Kano model and importance–performance metrics. The study classifies female users into four age groups to address their specific needs and proposes targeted strategies for enhancing female-friendly features in public spaces. This paper proposes a quantitative evaluation method for public spaces in old residential communities of Beijing, which combines the Kano model with IPA and is grounded in the perspective of female-friendliness. This research offers valuable insights for the revitalization of old residential communities and support for the diversification of public areas. The results indicate that increasing the types of public spaces, enriching public space facilities, enhancing the aesthetic appeal of public spaces, and promoting social care can improve the female-friendly level of public spaces in old residential communities.

Against the backdrop of promoting rural revitalization and ecological protection, the quality of rural life and living environment has been greatly improved. But with the improvement in rural living standards, the amount of domestic sewage discharge has also increased, bringing enormous pressure to the rural environment. Therefore, strengthening the construction and management of sewage treatment facilities is an important part of achieving sustainable development. This article takes rural areas in western China as an example to investigate and analyze the characteristics and existing problems of their domestic sewage treatment facilities. A set of evaluation indicators for rural domestic sewage treatment facilities suitable for western regions is constructed, which covers three aspects of evaluation indicators: Technology, Environment, and Economy. The weights of each evaluation indicator are determined through the fuzzy analytic hierarchy process. Validate the model through specific cases to ensure the practicality and accuracy of the evaluation system. This provides a certain reference for the scientific management and sustainable development of domestic sewage treatment facilities in rural areas of western China. This article has important practical significance for promoting the scientific management and sustainable development of rural domestic sewage treatment facilities in western China and also provides useful reference for rural environmental protection in other regions.