As globalization and economic development accelerate, urbanization has become an inevitable trend, radically transforming global societal structures and economic models while profoundly impacting the environment and human lifestyles. This study delves into the rapid urbanization of Beijing, China, highlighting its significant effects on environmental and ecological aspects. Employing an analytical approach, this paper examines the process of urbanization in Beijing, focusing on changes in the urban environment, water resource challenges, and the urban heat island (UHI) effect. Key findings reveal that Beijing's urban expansion has led to critical issues such as severe water scarcity and intensified UHI effect, with significant implications for ecological well-being and sustainable urban development. This research underlines the importance of balanced urban growth and environmental sustainability, advocating for integrated strategies including enhanced flood monitoring systems, accelerated development of water recycling facilities, and the adoption of the sponge city concept. These measures not only aim to improve water resource efficiency and urban flood resilience but also mitigate the UHI effect through increased urban green spaces and high-albedo building materials. The study offers valuable insights and lessons for global cities facing similar challenges. The study emphasizes the need for comprehensive, systemic approaches to urbanization that harmonize economic, social, and environmental aspects. This paper contributes to the broader discourse on sustainable urban development, offering a framework for future urban planning and policy-making that prioritizes ecological safety and improves the quality of life for urban residents.