TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The peripheral barricading is utilized for isolating the semi-enclosed type flexible or semi-flexible barricading on blue-green algae on the water surface. The peripheral barricading is further provided with a water inlet channel and a water outlet channel. The central barricading is utilized for blocking the enclosed-type detachable flexible barricading for exchanging water between the peripheral area and the central area. The peripheral ecological floating bed or the central ecological floating bed is a wet floating bed on which the floating plants and/or emergent vegetation are planted. Submerged plants are planted on the carrier of the ecological jellyfish. The coverage ratio of the peripheral ecological floating bed or the central ecological floating bed is 14-35%, and the coverage ratio of the central area is 15-40%. A photosensitive sensor is arranged on the carrier of the ecological jellyfish. A photosensitive controller for feeding back the signal of the photosensitive sensor is arranged on the floating body controller. The photosensitive sensor is connected with the photosensitive controller through a sensor. The photosensitive controller is mounted on an external part of the floating body controller or internally arranged in the floating body controller. The supporting framework of the ecological jellyfish comprises an internal ring framework, a spoke, a sizing ring and an external ring framework. The internal ring framework is a spherical cavity body. The spokes are distributed around the internal ring framework to form a circular surface or a cone surface. Several annular sizing rings with different inner diameter are fixedly connected on the spokes. The external ring framework is fixedly connected around the spokes. The photosensitive sensor is mounted on the external ring framework of the supporting framework or the fixed floating body. The biological carrier layer of the ecological jellyfish is filled in spaces among the spokes. The biological carrier layer is divided into an aquatic plant growth medium layer and a biological packing layer from top to bottom. The aquatic plant growth medium layer comprises yellow sand, sludge, plant fiber and/or bioceramic particles. The biological packing layer is a suspended spherical filler, a fibrous filler, a raschig ring and/or a porous textile cloth. The submerged plants are planted on the biological carrier layer. The fixed floating body of the ecological jellyfish is an inflatable rubber ring or a low-density hydrophobic foam material. The fixed floating body is fixed in the external ring framework of the supporting framework. The inflatable floating body is an inflatable internal-ring rubber ring, which is located in the internal ring framework of the supporting framework. The floating body controller of the ecological jellyfish comprises a floating body controller framework, a floating body material layer, a submerged material layer and a gas filing pipe sleeve. The floating body material layer and the submerged material layer are arranged on an upper part and a lower part in the floating body controller framework respectively. There is at least one fixing cable of the ecological jellyfish. Several assistant cables are arranged on the fixing cables. One end of the assistant cable is fixedly connected on the fixing cable, and the other end is fixedly connected on the carrier. The anchor part of the ecological jellyfish is a reinforced concrete preformed part, a sand bag, a stone or a stone bad. A lifting button for placing the anchor part is arranged on the anchor part.