In recent years, one of the developments in the country's administrative system is the identification of offices, institutions and organizations with similar services and the elimination of parallel activities on multiple devices and transferring them to the organization, or in other words the merger of several offices and organizations in one set.Although this is done with the goal of mobility and dynamism of the new organization in providing better services or more desirable production, while during the merger stages, the integration workers and organizations are thrown into an area of uncertainty and concern. In this regard, the present study aims to clarify the integration with emphasis on public organizations.This is as a study that used grounded theory to get insight about experiences in implementing merger strategy successfully through in – depth interviews with 18 academic-professional organizations experts including custodians and experts in integrating public organizations. In order, gathered data to design a model of successful strategy implementation. According to guidelines of open and axial coding, in form of 20 sub- category were conceptualized and classified in 6 main category and finally the model was developed. This model also explains factors influencing the merger strategy implementation and also how these elements interact with each other. Outcome of model including achiving effectiveness and increasing public efficiency and organizational agility.