A water culture hydroponics system of the invention is mainly disposed with a box body. At least one vertical plane of the box body is disposed with a plurality of openings for placing plants. At least one water pipe is disposed onto an inner side of the box body. The surface of the water pipe is disposed with a plurality of water spraying holes such that fluid within the water pipe is sprayed toward the plants from each water spraying hole. An exterior of the box body is disposed with at least one lamp wall for providing lateral light source to the plants to allow the inside of the box body to achieve optimum uniform moisture effect, and in conjunction with the irradiation of light beam, an effect of culturing and growing plants can be facilitated.
