Abstract: To comprehensively promote the integration of science and education and the reform of chemical experimental teaching, this article introduces the concept of "science, technology and society (STS)" in comprehensive chemical experiments to develop undergraduate experimental teaching through the form of "projects" and taking the experiment of Au nanoparticles as an example. By integrating scientific research methods and technology into undergraduate teaching, the students can master scientific research methods and the latest scientific technologies and acquire their ability of scientific research, finally achieve the sense of achievement in the application of science and technology in society.

Key words: Undergraduate experimental teaching, STS concept, Experimental exploration, Scientific research, Science and technology