The chain of agreements in Hamlet has unique aesthetic characteristics. In order to explore the truth of his father's death, Hamlet made efforts with people around him to take a revenge as well as to change the chaotic order, mainly depending on his ability to conclude agreements with free will instead of by forceful impulse. Thus, keeping and breaking the promise is both pivotal for the development of the plot and critical for Hamlet to launch the plan for revenge, and through the contemplations about free will and moral responsibility embodied in agreements reveals Shakespeare's philosophical thinking on human nature and society. It can be said that Hamlet has restored Demark to an orderly state with the manipulation of contracts from the perspectives of Occam's Razor Principle.