A straightforward definition of this word is a model that considers social phenomena as a group of dots&sbquo the lines that connect them&sbquo and the awareness of human beings. That is&sbquo whether individuals or groups&sbquo the parties making the action are dots&sbquo while everything exchanged&sbquo such as behavior&sbquo resource and information&sbquo between the parties is considered to be a line&sbquo and where people are aware of its expression as a phenomenon. More specifically&sbquo it is the expression of every relationship between friends&sbquo relatives&sbquo ethnic groups&sbquo nations&sbquo etc&sbquo&sbquo in terms of communication net-works&sbquo functional networks or cultural networks&sbquo A network always has a center. Socially&sbquo the question is how control by authority should be centralized or decentralized in order to build an ideal network&sbquo or&sbquo in particular&sbquo model the structure of and changes in the relationships. Those who were paying most attention to this were a group of progressive balance theorists of which psychologist F. Heider was the central figure. This attempted the theoretical development of the creation and formation of networks from the viewpoint of mutual exchange&sbquo transitivity and centrality. This approach later achieved a certain level of results. Social networks&sbquo however&sbquo are by no means models that can be analyzed the oretically. In reality&sbquo the theoretical construction of network models tends to fail into verification of experimental models since their deviations from actual social systems become evident. Considering the above&sbquo proposing network models in design is a major theme in establishing the domain of grand design.