The article is devoted to the analysis of imagination as a philosophical and sociological concept that played a significant role in the development of social theory in the middle of the 20th century. Exploring the premises of the contradictory relationship between science and society, it is easy to find a connection between the development of science and social change. Currently, it is generally accepted that scientific, including social theories, through the transfer of ideas, transform the social order and, on the contrary, social practices transform knowledge about the world. The article proves that imagination plays a key role in this process. An excursion into the theory of ideas reveals the connection between imagination and irrational and experiential knowledge. The author of the article refers to the works of P. Berger and T. Luckmann, C. Castoriadis and C. Taylor, who showed a direct connection between theoretical ideas and the world of "social imaginary", collective imaginary and social changes. For the first time in the history of mankind, thanks to imagination, society does not see the social order as something immutable. Methodological cases are presented that illustrate the specific role of the concept of imagination as a source of the formation of new research strategies that allow for a new look at the problem of nationalism (social constructivism) and the study of public expectations from the implementation of technological innovations (STS). For decades, Benedict Anderson's work “Imagined Communities” predetermined the interest of researchers of nationalism in social imagination and the collective ideas based on it about the national identity of modern societies, their history and geography. The research of Sheila Jasanoff and Sang-Hyun Kim has formed a new track for the study of science as a collective product of public expectations of an imaginary social order, embodied in technological projects. The conclusion is made about the contradictory nature of social expectations based on collective imagination: on the one hand, they strengthen the authority of science in society, on the other hand, they provoke the growth of negative expectations from the introduction of scientific discoveries. The article substantiates the opinion that imagination is an effective tool for assessing the risks of introducing innovations.