科学理论是科学的一种投影,科学理论的真实与否能反映出科学的真实与否。当今,学术界对科学的哲学反思基本是在认识论层面上,很少涉及本体论,如是否存在必然的科学,是否存在必然的知识。笔者将以科学理论为个案,从科学理论评判标准的变迁和案例两个层面对其进行讨论,得出:科学是一种求真的信仰,不存在必然真的科学与必然科学的知识。 Scientific theory is a projection of science. Whether the scientific theory is true or not can reflect the reality of science. Today, the academic philosophical reflection on science is basically at the epistemological level, seldom involves ontology, such as whether there is a necessary science, whether there is an inevitable knowledge. Based on the case of scientific theory, I will discuss it from two aspects: the change of the judgment criterion of the scientific theory and the case, and come to the conclusion that science is a kind of faith of seeking truth, and there is no certainty of science and necessary scientific knowledge.