Social networks are composed of individuals (or organizations), each of which are present in the network as an individual or group, and can establish contact with some other individuals or groups either directly or indirectly. The members of these groups establish contact with each other because they are friends, classmates, colleagues, have similar interests or beliefs or such like. The members share some personal information such as name, photo, contact number, workplace and the like. At present 74% of the world population uses social networks and weblogs, and it is predicted that in 2014 the number of social network users will rise to 3.4 billion; 63% of the people in Asia and Australasia use social networks at home or work. This study deals with the third paragraph of Articles 3 and 10 of the Fifth Plan for Development of Iran (2011-2015). It is developmental and applicational and is intended to design the future scenario of social networks about soft war. After studying the grand processes, grand propellants and strategic challenges with regard to the last global scenario about social networks, the propellant and strategic challenges of Iran in social networks were estimated. The position of propellants with lack of high certainty, which are the most important, were determined using reporters’ panels and the Micmac software; the uncertainties of “security”, and “proper infrastructure”, were chosen as the most important uncertainties. Because of the significant relationship between these two certainties, a two-dimensional space was developed, and a spectrum of “security” to “insecurity” was put on the horizontal axis, and a spectrum of “proper infrastructure” to “improper infrastructure” was put on the vertical axis. By including soft war in these estimations as a key factor in the third millennium interaction, the space of the scenario changed from two-dimensional to three-dimensional. “Soft war” is put at one end of the spectrum and “hard war” is put the other end. As a result 8 spaces were developed, from which only the following space was chosen: security -proper infrastructure- soft war. After taking a proper arrangement for the proposed space into consideration, the space for the scenario of social networks with the soft war approach was illustrated as follows: establishing proper infrastructure and paying attention to security demands in social networks in order to employ it in the third millennium competitions in soft war.