In view of the construction of modern virtue ethics, potential ethical space is contained in functional concept about human in Aristotle's teleology, whose functional concept is not only a moral method to build a bridge between modern facts and value, but also opens up a real moral realm for the reconstruction of the lax and evacuated modern self. That means each human has a uniqueness and can realize his own happiness and the essential force in their virtue life activities of “identity ”and “role”. Therefore, the reinterpretation of functional concept in Aristotle's goodness teleology has its ethical value in that it enables human, in the ideal dimension of his existence to obtain happiness latitude and virtue basis as well as the path of life realization.