Since the Roman Law, the accretion system has been an essential system which establishes in the Real Rights System, and it is useful in confirmation of property right and cause of the real right change, including coincides, mixture and processing.

The arrangement that the sixth proposal of Jus Rerem stipulates special provisions of ownership acquisition by a chapter is very good,however,this thesis think that the provisions about preoccupation,ownership acquisition of currency and negotiable security and acquisitive prescription should be added that chapter,and the provisions about accession in the previous proposals should be retained.

Marine reclamation belongs to the action of real right; the attribution of marine reclamation land is juristically so-called accession in civil law; the land produced in marine reclamation is state-owned.

Nowaday, disputes about accession is increasing, butbecause of depletion of legislation, judges seldom apply accession rules to relove thedisputes so that it is much waste of social resource.

It is keeping values and encouraging value-creation that has been interpreted as the main aims of accessio since Roman Law.

Since the Roman Law, the accretion system has been an essential system which establishes in the Real Rights System, and it is useful in confirmation of property right and cause of the real right change, including coincides, mixture and processing.

The accretion of the property law system since the Roman property law recognized by all countries,it is recognized property rights,caused by changes in the property system of property rights an important and indispensable in the system.