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.