This paper takes typical cruise ships in recent years as the main research object. According to the analysis of the basic requirements of cabin layout, the functional characteristics and layout rules of various cabins of large cruise ships correspond to the appearance. Combined with the characteristics of deck space where the cabins are, the influence of cabin layout on the exterior design of cruise ships is analyzed. And then the common forms and general rules of cabin in exterior modeling are summarized. Then the legend of the performance of cabin in exterior modeling and design considerations, which can provide basis and reference for cruise ship appearance design, are formed.