He studied the i3rownian movement deeply 、 explained the photo electric successfully 、 gave the conception of the quantum hypothesis and founded the wave identification of a dual property of ray radiation 他深入地研究了布朗运动；提出光量子概念，创立了光辐射量子理论，成功地解释了光电效应；创立了狭义相对论和广义相对论等等。
