A device and method for authoring a scalable application service are provided. The authoring device for a scalable application according to an embodiment of the present invention includes SADL integrated contents in which all or a part of existing contents is replaced with a Scalable Application Description Language (SADL) component that adaptively changes according to a characteristic information condition, A data processing unit for generating the data processing unit, and a user interface for interacting with the data processing unit and the author. The data processing unit may include an existing content processing unit for analyzing existing content by components and displaying the same through a user interface, a feature information condition to be applied to a component selected by the author through a user interface among the existing content components analyzed by the existing content processing unit And a component editing unit for setting other resources for replacing the resources of the selected components of the existing contents in accordance with the property information condition edited in the condition editing unit.
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