A hundred and fifty years ago, Marx completed an important philosophical reform: marked by the establishment of the principle of practice. This principle covers three basic meanings: 1. Human life and everything related to it is the sole object of philosophy; the underlying purpose of all questions in philosophical research is to improve human life. 2. Philosophy interprets the world in order to change the world. Changing the world is the ultimate value and objective of philosophical research and interpreting the world is the prerequisite for and means of reconstructing the world. 3. In changing the world to realize an ideal future, man follows the principle of value; that is, man is the yardstick for measuring the utilization of objects.