The remote control float valve consists of a main valve and an external guide valve. It uses the floating ball in the water to link the guide valve due to changes in the liquid level, so that the main valve supplies water and closes, thereby controlling the water level of the pool (tank) and water tower within a certain range to prevent overflow and low water level. This valve is suitable for automatic water supply systems of various pools (tanks) and water towers in industrial and mining enterprises and civil buildings and is also used in atmospheric boiler circulating water supply systems. The main valve opens quickly and closes slowly without causing a water hammer. It is tightly sealed and there is no risk of flooding.