The embodiment of the invention discloses a reservoir water body eutrophication ecological repairing system which comprises a fishing device, a three-dimensional measuring system, an ecological floating island, a suspended island rack, an autonomously driven microorganism self-circulation advantageous culture device and an aeration device, wherein the fishing device is used for fishing floating garbage; the three-dimensional measuring system is used for forming three-dimensional monitoring images; the ecological floating island and the suspended island rack are used for establishing a static purification system; the autonomously driven microorganism self-circulation advantageous culture device is applied to in-situ culture of advantageous microorganisms and oriented release of advantageousmicrobial populations; the aeration device is used for maintaining dynamic balance of dissolved oxygen of different zones. By forming the three-dimensional and dynamic and static ecological repairingsystem, purification and repairing can be achieved differentially and dynamically according to three-dimensional detection results, the whole purification process is carried out in a biological mode,no secondary pollution can be caused, plant harvesting can also be implemented after treatment, dual purposes of treatment and harvesting can be achieved, nutrient components in a nutrient enriched water body can be reasonably utilized, and effective and economic purification and repairing purposes can be achieved.