A hydroponic cultivation system for cultivating plants in a continuously flowing culture solution, comprising at least one hydroponic cultivation unit having a tank, an inlet and an outlet, wherein: each of the at least one hydroponic cultivation unit is vertically stacked with one another to form a multi-level structure; and the culture solution is configured to flow top-to-bottom through each of the at least one hydroponic cultivation unit on each level; and a plurality of support members, wherein: the plurality of support members are removably disposed, and configured to provide mechanical support, between two hydroponic cultivation units on every two neighboring levels; and at least one of the plurality of support members connecting two hydroponic cultivation units on every two neighboring levels comprises a pipe having a top opening, a bottom opening, and an empty inner space, configured to provide a means for arranging at least one of a hydrological connection or an electrical coupling between the two hydroponic cultivation units on the every two neighboring levels, characterized in that the hydroponic cultivation system further comprises: at least one light source, wherein each of the at least one light source is disposed over a back side of one hydroponic cultivation unit on a first level and is configured to emit a plant-compatible light to thereby support growth of the plants being cultivated on another hydroponic cultivation unit on a second level, wherein the second level is one level lower than the first level. each of the at least one hydroponic cultivation unit is vertically stacked with one another to form a multi-level structure; and the culture solution is configured to flow top-to-bottom through each of the at least one hydroponic cultivation unit on each level; and a plurality of support members, wherein: the plurality of support members are removably disposed, and configured to provide mechanical support, between two hydroponic cultivation units on every two neighboring levels; and at least one of the plurality of support members connecting two hydroponic cultivation units on every two neighboring levels comprises a pipe having a top opening, a bottom opening, and an empty inner space, configured to provide a means for arranging at least one of a hydrological connection or an electrical coupling between the two hydroponic cultivation units on the every two neighboring levels, the plurality of support members are removably disposed, and configured to provide mechanical support, between two hydroponic cultivation units on every two neighboring levels; and at least one of the plurality of support members connecting two hydroponic cultivation units on every two neighboring levels comprises a pipe having a top opening, a bottom opening, and an empty inner space, configured to provide a means for arranging at least one of a hydrological connection or an electrical coupling between the two hydroponic cultivation units on the every two neighboring levels, characterized in that the hydroponic cultivation system further comprises: at least one light source, wherein each of the at least one light source is disposed over a back side of one hydroponic cultivation unit on a first level and is configured to emit a plant-compatible light to thereby support growth of the plants being cultivated on another hydroponic cultivation unit on a second level, wherein the second level is one level lower than the first level.