The socio-physical network of the social information institution(NSII) is a system to support all sorts of group activities relating to the urban proximity that human can develop during the collaborative participation in order to produce the knowledge based context where they can share their experience and interest in the micro community as well as the macro one beyond the administrative boundaries such as district, county, and city. As regarding its attributes in terms of the physical environment and the facility management, there might be classified types of the NSII by analysing not only the spatial structure but also the user activity to alleviate the social conflicts of digital divide by providing underdeveloped communities with information accessibility in the city. This research carried out the web-based survey of the questionnaires in terms of teachers, students and parents as residents in the local communities in Seoul. The 1,126 samples over 33 school districts consisting of 115 teachers, 675 students and 336 parents are to be analysed to define the personal priority of the information facilities and the social demand of information program in addition to the paralleled survey of statistical data provide by the government index that discloses the national information-scape in terms of 1)internet accessibility, 2)computer distribution, 3)information gap, 4)information access gap, and 5)school information level. The research of the NSII is to focus on the critical factors structuring the urban system on behalf of user groups and therefore it is to validate the coalition between the typological structures and the geographical arrangements composing the network by the matrix of 1)accessibility, 2)validation, 3)priority, 4)connectivity and 5)individuality. The comprehensive approach of the socio-physical proximity based on density and frequency of the group activity can develope a coherent system of juxtaposed urban layers driven from the collective history over the social information-scape such as 1)informative subject, 2)user-oriented interface, 3)cycled accommodation, 4)converged program and 5)risk-free capability so that the public can make use of the institutional city-platform for the shake of systematic optimization of information resources.