Abstract: An active indoor planting dynamic carbon dioxide concentration adjustment system includes a planting assembly, multiple variable light intensity illuminating devices, a carbon dioxide detector and a controller. The planting assembly is disposed in an indoor space, and the illuminating device is configured to illuminate the planting assembly according to a control signal to cause photosynthesis of the planting assembly. The carbon dioxide detector is configured to detect a carbon dioxide concentration in the indoor space and to emit a concentration signal. The controller is signally connected to the illuminating devices and the carbon dioxide detector, and is configured to receive the concentration signal and give the control signal. The controller dynamically adjusts the light intensity of the illuminating devices according to the concentration signal, thereby dynamically adjusting the efficiency of the photosynthesis of the planting assembly.