People's cognition about management is a process from“simple”to“complex”, beginning in perceptual and intuitive experience, then gradually developing into rational thought of revealing the essential attribute. On the basis of hierarchical framework of modern science and technology system, the mutual mappings between the key concepts in system science and the ones in management science are built. Under the systematological thinking, systematicness is an attribute of all management activities. Any management activity is not only a systematic practice, but also a practical system. With the development of human society, management practice and essential attributes are showing an overall evolution trend from systematism to complexity. Complex integrity becomes the important cause and profound connotation of various types of complex management, which is the significant practical and theoretic logic to realize the amalgamation of multi-discipline and solve complex problems in management field.