"One Blueprint" is one of the most important concepts on spatial planning system reform in China nowadays. After picturing a big-view of multi-planning structure on city/county territory, this book is pioneered to generate the One Blueprint theoretical framework: 1) The nature of One Blueprint lies in guiding the coordination of multiple spatial intervention actions and instruments; 2) For any form and content of spatial related planning, the nature of spatial intervention can be deconstructed into the following three sub-system including Spatial "Areas" Zoning, Spatial "Elements" Allocating, and Spatial "Patterns" Shaping. Therefore, the coordination problem of spatial intervention action complexity could finally return to the reorganization of the above intervention sub-systems. On the basis of more than 600 spatial related plan cases and 1800 planning related documents as database, the following work has discovered all the organization rules, technical routes and spatial intervention mechanisms on the above three spatial intervention sub-systems in depth. The whole work develops an approach for multi-planning integration at the bottom logic, giving positive enlightenment for reshaping spatial planning system in China and beyond.