As a part of preparing for post-unification era of Korea, it has been acknowledged that preliminary works on both legal systems should be commenced ahead in order to mitigate possible legal problems caused by discrepancy of law between South and North Korea after unification. With growth of the need, we are dealing with similarities and differences of provisions of 'Succession' in Civil Code which is basic relationship in organizing society. The objective of this article is to analyze context of both Codes as a basis for discussions of harmonization or convergence of law and policy in future unified legal system.It is found that both legal systems on 'Succession' have lots of similarities as well as great differences. Supposing Unified Civil Code, this similarities give us a hope for possibility of well-matched outcome. But the differences prompted indication that such enactment need endless effort due to limitation itself. The law of succession in North Korea forbids private possession of means of production and allows only Legal succession and Wills succession is allowed limited bounds.In Legal Portions, it takes no notice of the special consideration for a spouse.In Legally Secured Portion, it gives undue value to security of living of persons entitled to get support.These features show us the limit of the law of succession of North Korea.But, in the point of harmonizing, some positive features may be found to some degree in North korea's legal context. First of all, in related to "Duty to Respect and Furnish Support of parents", One who has treated the inheritee very cruelly or one who has not been care of the inheritee consciously becomes disqualified as successor.Second, the principle of Qualified Acceptance for debt. Therefore the enactment of Unified Family Law will be based on the similarities and differences.