Abstract: Because of information problems, the agent can not observe how hard the client works, so he needs to motivate and supervise the client of his corporation. This paper attempts to put the operating standard coefficient and manufacturing cost coefficient into the optimal excitation mechanism model, in order to get the corresponding optimal motivating coefficient and know how hard the client works, through the design and calculation of the model. This paper analyzes all kinds of affecting elements and finally, offers some strategies of how to improve the relationship between agents and clients.