本文首先介绍了日本清水公司分别于2007年和2014年发布的“海上环境未来城市”和“深海螺旋城市”的建设构想。前者的设想是建造大型海上浮岛型城市，通过城市系统内部的植物、生物布局，实现粮食的自给自足，并逐步减少二氧化碳的排放，形成一个无碳、无废弃物、百分之百可再生能源供给的海上城市；后者的设想是在水深为3000～4000米的深海区域建造一个从海底到海面的构造体，其主体为漂浮于海面的球状构造物，球体下部连接螺旋状的通道，可供人、电路以及资源运输往来，直接连接到海底。本文最后论述了日本海洋城市的建设构想对海洋开发的启示。
First，the study introduces two constructive plans named as Green Float and Ocean Spiral posted by Japanese SHIMIZU Corporation in the year of 2007 and 2014. Green Float was supposed as a huge floating inland，which is driven by a inner system built with plants and other biological elements，with supply of totally reproductive energy and food self-supply，without any carbon emission or waste treatment. Ocean Spiral plans to build spherical architecture floating on sea. Transportation of human being，electricity and other resources between the floating building and seabed can be finished by spiral channels connecting at bottom of it to the area 3-4 thousand meters deep from the ocean surface. What are introduced in the study are inspirations to ocean development in China.
| Keywords： | Carbon EmissionFuture City on the SeaUnder Sea CityArtificial Floating InlandOcean Environmental Conservation |
