There are provided a parameter setting device capable of cutting down development costs, and various social costs by reducing the burden on work for optimizing parameter values, and so forth. An acquisition means acquires output results while varying parameter values of parameters. A determination means determines optimum parameter values on the basis of the output results acquired by the acquisition means. An acceptance means accepts a user's instruction for determining a procedure of acquiring the output results by the acquisition means, and a method of determining the optimum parameter values by the determination means. A storage means stores the output results acquired by the acquisition means. According to the parameter setting device of the invention, since the user's instruction for determining a procedure of acquiring the output results by the acquisition means, and a method of determining the optimum parameter values by the determination means is accepted, it is adaptable to various systems while reducing the burden on work for optimizing the parameter values.