Since the 21st century, the term "scene" has been widely used in various fields, mainly involving sociology, communication, education, the Internet, commercial marketing and so on. Academic circles have also carried out scene-related research to form their own definitions and theories. With the continuous innovation of technical means, the connotation of a scene is constantly enriched, from the face-to-face physical space dimension to the multi-dimensional information space, and gradually evolved into the scene characteristics of spatio-temporal integration. However, there is still a lack of complete theoretical research and practical discussion on what is the scene, what are the elements of the scene, and how to combine the specific scene to guide and carry out the scene planning and design in different fields. The existing scene theory cannot be well applied in the field of urban development, and cannot help the scene related research of coordinated development of urban agglomeration. By combing the development context of scene theory at home and abroad, this study makes an in-depth interpretation and analysis of the connotation and characteristics of the scene. It is believed that the scene contains six characteristic elements, such as time, space, object, problem, path and value. The scene is a kind of specific interactive relationship formed by a series of actions, based on the key issues and objectives of the events under specific spatio-temporal conditions, with technology and resources as the media. The construction of the scene can meet the needs of stakeholders and create and realize value. The theoretical system of scene planning including scene elements, scene hierarchy characteristics and scene planning methods is constructed. It is considered that scene planning is a systematic process to realize specific social, economic or ecological functions and values by integrating existing resources and technologies to carry out scene construction and design, focusing on key issues and objectives with stakeholders as its center, under the environmental factors of social and economic development, government policies and technological innovation. From the perspectives of scene recognition, scene construction, scene evaluation and scene application, the new exploration of scene planning tools is realized to guide scene practice in different fields. Taking the coordinated development of urban agglomeration in the Guangdong-Hong Kong-Macao Greater Bay Area as an example, this study excavates the current problems and development objectives of the Greater Bay Area based on the scene planning method, identifies 100 important scene units representing the coordinated development direction of urban agglomeration in the Greater Bay Area, and identifies and analyzes each scene element for these scene units, so as to provide basic support for further scene construction. Finally, taking the ecological corridor construction of urban agglomeration in the Guangdong-Hong Kong-Macao Greater Bay Area as an application example, the scene planning method is preliminarily applied to analyze the scene elements, so as to provide a basis for the next practical exploration work such as scene evaluation and scene application demonstration. The theoretical system of scene planning is not only a further extension of the scene concept, but also an overall coordination tool to promote the coordinated development of urban agglomeration. It can provide theoretical basis and practical guidance for the future scene research on the coordinated development of urban agglomeration, and help the collaborative construction of urban agglomeration. In the future, it is suggested to carry out specific scene analysis and scene design on the industry, population, transportation, environment, infrastructure and public services of the GBA urban agglomeration, and gradually realize the in-depth exploration of the coordinated development theory and mechanism innovation of the Guangdong-Hong Kong-Macao Greater Bay Area through the scene planning theory.