Abstract: Science and technology are important issues of Thorstein Veblen’s research. Introducing evolutionism and psychology into his research of science and technology, he put forward his determinism of science and technology, evolutionism of science and technology, and technocracy. As a point of junction in the development of technocracy, Veblen’s theory of science and technology contributed to the American theory of science and technology in the humanist tradition, which has been ignored for a long time. It has some inspirations for a study on philosophy of science and technology in China.