The invention is applied to the field of building greening, and provides a fabricated wall greening system. The fabricated wall greening system comprises a wallboard, a plurality of containers where plants are planted, a frame used for mounting and fixing the containers and irrigation equipment used for conducting drip irrigation on the containers. According to the fabricated wall greening system,through integrated design, matching components, professional construction and systematic management, coordinating and unifying of functions, safety, beauty and economy of the three-dimensional greening system are achieved. The fabricated wall greening system can effectively relief and reduce the temperature of the wall surface, reduce the damage of the high temperature to buildings, improve the comfort level of the buildings, can reduce the heat resistance requirements of plants, and have stronger ecological and social benefits. The fabricated structure is easy to install, can reduce the installation of irrigation pipe fittings, and reduces the leakage probability. By adopting an irrigation mode of combining passive irrigation and a drip irrigation control system, the problems of heavy irrigation of vertical greening and uneven irrigation can be solved, the effect of saving energy, water and materials can be achieved, and the human cost is reduced.