Teaching supervision is an important part of the higher vocational education, yet it possesses the properties of a public product, which affects institutional innovation. That is why the supervision lacks endogenous elements, which is not beneficial for improving professional development of teachers. Furthermore, limited rationality and interests may affect the implementation of the teaching supervision. Finally, the conflicts between formal and informal systems on teaching supervision also help to decrease its effectiveness. So, this paper suggests building up a sound teaching supervision system in favor of professional development of teachers, and establishing national teaching supervision qualification system.