Abstract: Today’s world is going through the greatest change which was never seen in the past century, and the Chinese communists take it as a new historical arena of adhering to and developing the basic principles of Marxist philosophy in guiding and pushing forward the great cause of socialism with Chinese characteristics. For the creative application of these philosophical principles in Xi Jinping’s theory of socialism with Chinese characteristics, the first thing is to put up that the concept of being systematic is the fundamental way of thought and work, which means to emphasize the scientific foundation of Marxist ideas and methods. Secondly, the concrete manifestation of applying the concept of being systematic is to systematically analyse the laws of development in human society, socialist construction, and the communist party in power, and identify the relations according to the principles in which the big system control the small ones, the small systems give impetus to big ones, and the interrelations of all elements within systems, thus to be “continuously finding and creating” in the process of studying these three major laws.