Bauhaus movement was a new paradigm shift in 1920's, leading to interna-tional style and modern movement in architecture and the application of so-cial sciences in urban planning. After the World War Two the developmentIn high technology in 1960's, in 1970's and in 1980's created incremen-tally new paradigm shifts in design discipline and nourished post modernismand other movements in arch itecture.This paper aims at shedding light onthe new developments in design methods and theories in relation to the ex-tensive use of computer aided design (CAD), which follows and utilizes thedevelopments in computer science and technology, cybernetics, informationtechnology, cognitive sciences, theories of learning, knowledge acquisitionand nowledge representation. This new paradigm shift In design methods andtheories leads us to the area of artifical intelligence (Al). The other side ofthis change concentrates on the crucial efforts to bridge the gap betweenprofessional practice and education, professional practice and researchworks trying to make computers replace human experts. Developments innew visual devices and tools of high design and information technology en-hance the quality of the approaches. The requirements of high technology so-cieties force us to deal with computer psychology in relation to CAD. We need new methods and techniques to solve the problems of computerized de-sign environment. On the other hand CAD education, education of CAD educa-tors, relations with proffessionally practicing designers as experts aremain problem areas to be solved. We need to develop new methods to utilizecomputers, to develop data and knowledge storage methods in order to under-stand experts and real life situations, to acquire knowledge from experts, todevelop simulation methods for representing expert knowledge and real lifesituations. The Importance of self designing as a learning procedure eitherfor lay people or professional education is recognized for the future re-quirements of computerized learning. New modern architecture has roots inthe high technology environment of this era. In this new paradigm in design-discipline some experiments and studies have been condected by the autor toacquire knowledge from the design domain. User's and designers informationprocessing is accepted having enormous impact on the research studieswhich are on environmental issues to shed some lights to the environmentalinfluences on design, design process, users, and user perception on the en-vironment. Information processing has important Impact on cognitivestructure of the users as well as designers. It is very difficult to acquireknowledge and it is important to understand the foundations of informationprocessing and cognitive structures and the conversations between theminds, and minds and minds and things, which leads to better understandingof the user's as well as designer's responses to each other and to the envi-ronment.Conversation between the parts are connected to the understanding of theconcepts and concept structures from which constraints and then rules ofdesign can be extracted and formulated in an expert system.A study was made to acpuire knowledge from professional young architectswho have experience in practice for a few years, related to informationprocessing and conceptualization in computer aided design. Different design-ing styles of young experts in CAD architectural design studio were invesi-gated. Conceptual structures of the designers were studied. Following theconcept structures some basis learning styles such as holist, serialist, in-ductive, deductive have been formulateu with reference to the expert re-sponses conflicting rules have been investigated. A set of rules for a givenobject have been formulated with reference to the expert responces. Con-flicting rules have been recognized, separation and clarification of right andwrong rules were made to provide a list of reles to be used in and expertsystem.