The invention relates to a fine bubble generator system, which has an air inlet port, a water inlet port, and a water outlet port, and includes a pump, an air inlet module, a water inlet module, and a control module. The pump has a pump inlet port and a pump outlet port. The air inlet module is connected between the air inlet port and the pump inlet port. The water inlet module is connected between the water inlet port and the pump inlet port. A first air-liquid tank and/or a second air-liquid tank, and a nozzle are connected in sequence between the pump outlet port and the water outlet port. The control module is electrically connected to the pump and the air inlet module, and is configured to control the pump to operate, and control the air inlet module to let air in from the air inlet port.