Abstract: Provided is an avatar service system and method for providing an avatar in a service provided in a mobile environment. The avatar service system may include a request receiving unit to receive a request for the avatar to perform an action, an image data selecting unit to select image data and metadata for body layers forming a body of the avatar in response to the request, and based on the selected body image data to further select image data for a plurality of item layers disposed on the body of the avatar, and an avatar action processing unit to generate action data for applying the action of the avatar based on the selected image data and metadata.