Taking cruise ship atrium spaces for examples, this paper focuses thematic design and correspondingly analyzes the spatial form, decorative style and functional layout of the interior decoration of the atrium from the dimensions of space narratives, i.e., elements,scenes and strategies.Combinedwiththethematicdesign of the atrium interior decoration of three Carnival series cruise ships, this paper conducts a comparative study with the help of narrative analysis and qualitative induction, such as language, grammar andpragmatics, expounds the narrative representation strategy of the thematic design, andputs forward relevant optimization suggestions.