By the end of 16 and the beginning of 17, the British bourgeoisie had matured. Under the influence of the Renaissance, people's minds were liberated and natural science made remarkable achievements. Francis Bacon (156 1 year-1626) has the greatest impact. He is both a philosopher and a natural scientist. Bacon believes that the task of philosophy is to go deep into nature, study and reflect nature, and gain knowledge from it, thus promoting the progress of science and technology. Bacon put forward the slogan "knowledge is power". In Bacon's view, knowledge is not only empty talk that is seriously divorced from reality like scholasticism, but also can not be replaced by religious belief. Knowledge becomes power because it can play a role in understanding and utilizing nature and promote the development of production. Bacon advocated understanding nature through scientific experiments. He believes that experiment is the most effective way to observe, understand and form knowledge and obtain new discoveries. Bacon's thought had a positive impact on British natural scientists, enlivened the British natural science field in the17th century and liberated the productive forces.