The purpose of the thesis is to develop scientific principles and practical recommendations for optimization of the functional and architectural planning organization of Iraqi airports terminals. The dissertation is devoted to the development of architectural planning organization of airports terminals taking into account the new technologies and trends in terminals architecture. A historical review of airport terminal design was conducted, foreign and domestic experience of airports terminals construction and planning was systemized and analyzed, the architectural styles of Iraqi international airports terminals in different regions (mountain, plateau, desert) were studied and the peculiarities of their formation were determined. Factors of influence on the planning organization and architecture of airport terminals were determined: natural-climatic, urban, functional-technological, socio-economical, structural-technical, transport-infrastructural, architectural-spatial, ecological, sanitary and hygienic, guaranteeing passengers and baggage safety. Features of terminals architectural and planning formation structure were revealed. The main design configurations and schemes of airports terminals were analyzed: linear, pier, satellite, concourses, hybrid, transport shuttle. The classification of existing airport terminals has been expanded and improved. The stylistic features of terminals buildings architecture and structures were characterized: Technologicalism, Romanticism, Traditionalism, Hi-Tech and Sustainable Architecture. The analysis of factors, features and requirements made it possible to determine and justify the principles of architectural formation and functional planning of airport terminals. The study determined the influence of modern innovative technologies on the formation of terminal builiding and formulated general principles for the organization of the architectural environment: the principle of technology of architectural environment, the principle of integration airports terminals with land transport, the principle of energy efficiency, the principle of flexibility of architectural environment. Layout types of architectural and planning solutions of different passenger terminals types have been developed: Standard type - architectural and planning solution type for small terminals that serving passengers of domestic and international flights and located in IV–V airports class. Interactive type – architectural and planning solution type for medium-sized terminals serving passengers of international flights, located in I, II, III airports class. Transport hub type – architectural and planning solution type for hyper terminals in the concept of «Interactive Terminal – Transport Hub», serving passengers of international and transit flights and located in the I class airports. The models of the functional structure of standard, interactive and transport hub types of terminals have been proposed. The result of the study is recommendation for architectural and planning solutions and organization of passengers and luggage transportation and guarantee their safety in terminals. In particular, Interactive Terminal – Transport Hub – a fully automated transport complex of interactive passengersʼ terminal includes functional zones like: Self-check in areas, customs and passport control with technology (E-passport gates, Smart tunnels), self-boarding gates, automatic baggage handling systems, formed in multilayers hub and has land transport stations: bus station, train station, underground metro station, serves passengers and their baggage. Passengers independently go through the boarding and disembarkation procedures and change the mode of transport: air, ground and underground. A new type of terminal building is scientifically substantiated as "Interactive terminal – Transport hub", which is an object for new functions (automatic inspection of passengers, integration of land and air transport in the terminal building), the methods of its architectural - spatial planning decisions were recommended on modular basis. On the basis of the theoretical research results, further development and recommendations on the design of airports terminals were formulated, conceptual projects of new terminals for international airports in Iraq was developed.