One of the problems in contemporary architecture is that it tends to focus on a formative exterior in construction without a human life within it, while a free form is generated. The concept of a space in contemporary architecture is vital because many architectural elements interact with each other. Other forms can be created or destroyed constantly in the space. Therefore, modern architectural forms need to be considered with in respect towards the quality within the space. In order to create a spatial-form that enhances the quality within the space which reflects the modern society, a proper understanding of the diagram is needed to use it as a design tool. The purpose of this research is to understand structural characteristics of the diagram for generating the spatial-form within the quality of the space.

For this research, the fundamental diagram, which is used to construct a space, was investigated through theoretical review of the spatial-form and the diagram in Chapters 2 and 3. In Chapter 4, characteristics of the diagram, and the relationship between the operating diagram and the generation of spatial-form were analyzed through a case study. In Chapter 5, a proper approach of the diagram was explored by studying structural characteristics of the diagram with problems that were derived from the structural elements of the diagram and the application of the diagram.

Through this research, the results obtained from each of the chapters are as follows:

In Chapter 2, the overall thinking system of space in contemporary architecture is Deleuze''s post-structuralism and Merleau Ponty''s phenomenological thinking system. In order to create quality within space, the main focus should be in the creation of a relational structure space and an experiential space. Generation of these kinds of spaces can lead to a difference occurring in the spatial-form through a diverse and complex relationship in space. In contemporary architecture, there is correlation between architectural space and form. A form should be generated through the process of creating space.

In Chapter 3, the diagram should be used as a design tool to solve architectural ''quality within space'' and ''difference'' derived from characteristics of generating spatial-forms in Chapter 2. The meaning of diagram could be derived from the `abstract machine'' that is a Deleuze''s diagram concept, which is quoted by architects in contemporary architecture. The diagram of contemporary architecture is not only a visualization of the information, but also a visual and explanatory media that compactly expresses the effects of power, material deformation, and movement over time. It also plays a role as a potential form that can generate a difference of architecture that would be created later on. This shows a correlation between the spatial thinking system and the diagram. Therefore, the architectural element, which deals with the spatial thinking system of modern, derived in Chapter 2, works as a diagram in the design process. In addition, the diagram has a direct relationship with digital technology which affects the design process. Digital technology has a profound impact in boosting the diagram and these diagrams can be used as a tool to generate potential differences in architectural space. For example, the diagram can be used as an explanatory tool to communicate in detail for the design process and also as a practical tool to connect the various levels of the urban situation. It can also be used as an expressive tool to represent a perceptual experience of space.

In Chapter 4, the diagram was classified into two different diagrams; ''Diagram for Generating Relational Structure Spatial-form'' and ''Diagram for Generating Experiential Spatial-form''. These diagrams were categorized by each operational element and the architects'' works were analyzed case by case. The ‘Diagram for Relational Structure of Spatial-form’ is operated by potential and rational methods to generate a new structure because architectural elements of the space and relational formation of the structure are important. On the other hand, the ‘Diagram for Generating Experiential Spatial-form’ is mostly operated by architect''s own sensibility. Potentially, it has an effect on the generation of spatial-form because it visualizes the unpredictable elements, such as an experience of body movement and a perceptual experience. In addition, common characteristics of the diagram appeared that the diagram is being operated throughout the design process with combined digital technology. Each architect has his or her own characteristics in construction of the space with their own concept and method. This leads to differences in each architects'' work. The structural elements of the diagram are rationality, abstractness, potentiality, and self-reference through case analysis of the characteristics of the diagrams.

In Chapter 5, the structural elements of the diagram, which are rationality, abstractness, potentiality, self-reference, were investigated in connection to Deleuze''s diagram. The result being that, there is a difference between the diagrams, which is expressed by architects and by the concept of Deleuze''s diagram. With the operation of the, problems occurred in construction of the space, due to the degree of structural elements of each diagram. Also, when digital technology is being used for operating the diagram, the results that rely on the ability of the computer generation technology goes against the construction of the quality of the space. In addition, problems can arise when an architect focuses on only the new exterior of a form, rather than the structure of the relationship in the space. The structural characteristics of the diagram were studied by generating a spatial-form without losing the quality within the space through these kinds of problems. And the following conclusions were obtained:

First, in terms of the purpose of a diagram, the diagram should be used as a tool to regroup diverse and complex relationships of the architectural elements in modern society along with creating a new potential relationship of order.

Second, in terms of the operation of a diagram, the diagram should be operated to generate a new and creative spatial-space with correlation between space and form in the architectural design process.

Third, in terms of the application of digital technology, when an architect is generating a diagram using digital technology, he should use it as a tool to convey his thoughts without using the technology to do so.

Fourth, in terms of the structural elements that form a diagram, the structural characteristics of the diagram that generate a spatial-form drew the following conclusions:
① Rationality: A diagram should take a reasonable route based on the post-structuralism thinking system with highlighted aspects of relativism.
② Abstractness: A diagram should take the abstract modes of expression to communicate numerous information and a variety of architectural elements in a compressed representation. The abstractness must be recognized so that it can create a new order, which is filled with specificity rather than a universal abstract.
③ Potentiality: A diagram should be a potential method to realize the open structure of modern society. Only when the element that leads the potential method is operated by an architectural element with reality, a quality of the space could be constructed.
④ Self-reference: Self-reference means to generate the spatial order that can make a self-production, ina creative and potential manner. When an architect uses digital technology to generate a diagram, self-reference that relies only on the technique should not be considered on a morphological self-production of the surface.