The bottom of the building has a bottom tire connected to the main hull, and the top surface of the building has a top deck, and the hanging beam is installed at the edge of the top deck. In the design, it is considered that the subsequent lifting needs to make the lifting ear and the living building structure as one whole, and the surface of the building body is installed in the access passage. The structural design of the integrated functional module's standard functional facilities, as well as the connection structure for lifting and installation, to facilitate assembly, save steel structural materials, reduce costs, simplify construction, reduce welding volume and save labor, and install various equipment and pipelines into life. In the building, the interface needs to be reserved in advance with the main hull, so that the living area and the main hull structure can be completely separated, which is convenient for the general group, which can significantly improve the construction efficiency of the living building and the integrity before installation in the main hull. Shorten the construction cycle and increase the efficiency of FPSO manufacturing.