Modern physics has laid a solid foundation for human beings to enter the electronic and information age, but it has also brought some confusion. Before the birth of modern physics, people knew the physical world clearly, intuitively and here cause and effect are clear, while modern physics showed the variability of spacetime, the particle nature of energy, the uncertainty of microscopic motion and other strange phenomena. Modern cosmology, based on modern physics, has seen the emergence of magical concepts such as the Big Bang, inflation, dark matter, dark energy and so on. In this regard, most scientists consider that nature is inherently complex and changeable, and with the development of science, it is natural that the world is becoming more and more complex. However, many people hold the opposite opinion, such as the EPR paradox put forward by Einstein, Bohm's hidden variables model and so on. They believe that the theory of quantum mechanics is incomplete.