Before entering into the subject of this study, we must clarify some ideas and concepts related to scientific research. The basic thing that we must always know in preparing scientific research is that the study and research are not just a collection of data, information and facts, but the researcher's interpretation of these facts and their meanings and putting them in a logical framework It is useful that will distinguish scientific thinking from others, scientific research requires thought, and hence the thinking that included scientific research is not scientific thinking or critical thinking, and scientific research results in information and data that, after benefiting from them, is knowledge that is used in the development of thought and society, so what is knowledge? How do we get it?
Human knowledge may be sensory, such as the succession of night and day, the rise of the sun and its setting, or it may be a philosophical, contemplative knowledge, which takes off from what the eye can see and what the ear hears and what the hand touches, where a person tries to think and contemplate the causes of values beyond nature about death and life, and about the Creator of existence His attributes and his proof of existence, which is knowledge that cannot be resolved by direct experience or may be empirical knowledge, and it is in which phenomena are interpreted scientifically, by linking phenomena objectively, which is based on the intended systematic observation of phenomena on the basis of developing appropriate hypotheses and verifying them by experiment and collecting data And the scientific knowledge does not stop at the partial vocabulary that a person is subjected to research, but rather the researcher tries to reach the general laws and theories that link these vocabulary to each other and enable him to generalize and predict what happens to different phenomena under certain circumstances, as scientific knowledge is in knowledge that results from an assumption.
In this study, the researcher focused on the role of theory, model and model in scientific research, to clarify and show the extent of their impact on the scientific research movement in the field of library and information science and its future in the Arab world.