## 7 Conclusions  
1. Since the signing of the Paris Agreement, the global construction industry is undergoing a crucial transition from \"energy efficiency\" to \"carbon reduction\". Countries worldwide are actively promoting the development of the construction industry towards sustainability, low carbon, and zero carbon emissions through updated policies, standards, and guidelines. ZCB and their technological systems have become essential tools for achieving carbon peak and carbon neutrality. However, disparities exist among the world's major economies regarding the definition of ZCB and the development of related policies. These differences pose significant barriers to the integration of technological systems, the adaptability of design methods, and the optimization of overall solutions. This study aims to address this issue by establishing a ZCB technology system tailored to the characteristics of tropical island regions. It analyzes key elements and core systems of TIZCB from perspectives such as energy flow boundaries, parametric design methods, and data-driven optimization algorithms, offering targeted research scopes and content for the systematic integration and application of ZCB technology in tropical island regions. 2. In the absence of unified standards for ZCB, innovative and systematic integration of technological systems becomes crucial for the development of ZCB in tropical island regions. This study identifies three key technical issues: accurately identifying energy conservation, energy production, and intelligent systems and their design parameters, quantifying the relationship between finely tuned system design parameters and building performance, and actively optimizing the technical and economic objectives of zero-carbon operational design schemes. Solving these issues forms the foundation for achieving systematic integration, accurate quantification, and comprehensive optimization of the ZCB technology system in tropical island regions. Key aspects include clear system boundaries, complete quantitative models, and appropriate optimization strategies. Through techniques such as systems integration theory, parametric design methods, and data-driven algorithms, this study aims to overcome challenges in fragmented technological applications and restricted optimization of design schemes, providing solutions for the accurate quantification of zero-carbon operation in tropical island buildings. 3. To address the key issues raised in this research, a series of solutions is proposed, encompassing research on the theoretical framework of ZCB systems in tropical islands, the mechanism of energy conservation, energy production, and intelligent systems, and case application evaluations, among others. By employing methods such as literature analysis, surveys, and expert interviews, the study gains in-depth insights into the needs and challenges of TIZCB. Combining systems theory, control theory, and synergy theory, the research constructs a comprehensive theoretical framework. Usingparametric design methods and data-driven multiple-output regression prediction models, the study systematically models, predicts, and optimizes the four major systems of energy, conservation, capacity, and intelligence. The proposed solutions contribute not only to enhancing the energy efficiency and environmental performance of TIZCB but also offer a practical technological and methodological framework for the integration and application of ZCB technology in the region. * This study extensively explores the current state of development of TIZCB from both theoretical and practical perspectives. Considering the unique climatic environment of tropical islands, it proposes a specialized ZCB technology system and optimization solutions, introducing new perspectives and methods in TIZCB research and practice. However, another clarification should be pointed out regarding the diverse conditions and climatic differences of other tropical islands (different from Hainan).