Economics is based on an abundance of human basis. Smith's egoism has become a basic system of marketing economy. Golson has discovered the descending law of boundary effect and the maximum law of hedonism. Keynes has successfully fulfilled the overall coordinating policies by means of the human psychology. Still, Becker has, by humanities, solved many economic problems existing in human activities. All this speaks for the systematic economics in complementation with humanities in that: 1. the stimulating mechanisms of the system help develop human enthusiasm; 2. the restricting mechanisms of the system help control human pessimism, which is vital for the development. Likewise, the key of the economic development lies in the extensive development of humanities. And the development of humanities, in turn, helps to push forward the economic development.