Social security by meaning insurance policies related to job and retirement and plans to support damaged persons that can guarantee of the welfare and comfort, is one of the most factor of getting sustainable Development in nowadays societies. Government is main responsible for welfare policies and social security in our country and also codify and enforce these policies. We studied Government’s plans at social security field during the period 1376-1392 base in Douglas north institutional economics theory, by using content analysis, Discourse Analysis and Documentary review methods for Institutionalized Explaining the social security system and it’s performance in this article. Data investigated by social security plans and laws (formal rules), ideologies, culture and norms related to social security (informal restrains( and also social security’s enforcement organizations aspects in mentioned period. The results of research show that social security system doesn’t have desirable institutional basis and it’s challenges rooted in weakness of formal and informal institutions. So that “unstable”, “inefficiency” and “performing challenges of social security system” respectively caused by “institutional unstable”, “institutional inefficiency” and “institutional enforcement weakness”. For reform this situation have to begin from institutional bases and if formal and informal institutions don’t reform, it wouldn’t happen any evolution in performance and enforcement aspects.
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