One kind of microalgae culture system for a livestock wastewater, and a microalgae fluid, comprising: a photobioreactor module for adding the liquid livestock waste and algae a light source module disposed on the photobioreactor modules around, in order to supply the light source a liquid control module, and the module connector photobioreactor to control to control a gas-liquid ratio parameter and a hydraulic control module, and the module connector photobioreactor to control to control a hydraulic operating parameters.
