The invention discloses an electric control flower watering system. The system comprises a power supply, a humidity sensor and a controller; a water tank comprises a spray head, a pipeline and an electromagnetic valve; the electromagnetic valve is connected with the controller; the humidity sensor is used for sensing the moisture in soil; and when the moisture is reduced, the humidity sensor transmits a signal to the controller, the controller controls the electromagnetic valve to be opened, and water flows out of the spray head. The system has the advantage of capability of performing real-time watering according to a plant growth condition.