Sea human habitation system and construction method thereof

The invention is suitable for the technical field of building construction, and provides a sea human habitation system and a construction method thereof. The sea human habitation system comprises a deck floating on a sea surface, a positioning plate, a house and a fixed station. The positioning plate can be movably mounted between the deck and the fixed station up and down. The house comprises at least one floor unit; each floor unit comprises modules and floors covering the modules, wherein the modules are provided with connecting parts, and two adjacent modules are detachably connected through the connecting parts of the two; one end part of each module is not parallel to one end part of the adjacent module; and the bottom of each floor unit at the bottommost of the house is detachably connected with the deck. The sea human habitation system provides a novel space for residential land of people, so that a great deal of manpower and material resources are saved. Moreover, an intersection part of adjacent two modules can form a relatively great communicated area or can be used as a public area. An uncrossed area can be used as a privacy area.