At present, string theory has not been widely accepted as a universal theory, but it is still an active research field, attracting many physicists and mathematicians. Some advantages of string theory include the natural integration of gravity and other basic interactions, and some new physical concepts and mathematical methods are also put forward. Although there are still many problems and difficulties to be solved, with the progress of technology and the deepening of research, string theory may develop into a more perfect and widely used theory in the future.