The invention discloses an automatic service generating system and an automatic service generating method both of which are based on an imaging service scene and a field template. The automatic service generating system comprises a browser, a server and a database. When customizing software or a service, the user drags a graph tag in a graphic interface of the browser firstly and then establishes an application scenario of the software or the service. The system analyzes the application scenario into two description files including a service procedure and a user demand through a graph mapping library, finds the field template meeting the requirement of the user in a field template library through the analyzing result and carries out dynamic customization or extension on the field template. Through searching and testing, components which are found in a component library and can achieve the setting purpose are added into the field template which is customized and includes the software or the service procedure structure and the service description information of the service procedure structure, and the process of generating the software/the service is achieved. At last, the testing and deployment are carried on the generated software/the service to enable the user to be accessed to or to use the customized software or the service. The automatic service generating system is easy and convenient to operate and maintain, and the user coverage is wide.