This book delves into theories and frontiers in territorial space planning, comprising 13 papers divided into two parts. The first part, consisting of six papers, explores the overarching direction and strategic thinking behind land spatial planning reform, the knowledge foundation of land spatial planning, construction logic, and theoretical systems. The second part, with seven papers, focuses on the compilation system of the land spatial planning system. This includes topics such as the elastic and transmission mechanism of overall land spatial planning at the city and county levels (Chapter 7–8), rural planning within the framework of detailed land and spatial planning (Chapter 9), and special planning in land spatial planning (Chapter 10–13). The latter covers areas like land ecological spatial planning, healthy urban planning, urban renewal, and urban design. Notably, this book addresses the gap in the planning and exploration of urban and rural built environments under the land space planning system. It emphasizes the need to consider the characteristics and sustainable well-being of "city being" within the overall land and space planning, striving to create better living environments for urban and rural areas. To achieve this, the papers in this book pay particular attention to urban renewal and urban design.