Abstract: A device for controlling water outgoing of a container by pressure includes a motor, an outgoing pipe, a water outgoing unit, a first thin film, a thin film sensing device and a check valve unit. The motor pumps water to a container. The outgoing pipe is connected between the water outgoing unit and the motor. The outgoing pipe has the check valve unit connected thereto. The thin film sensing device is connected beside the outgoing pipe. When the oater outgoing unit is set to be OFF, the pressure in the thin film sensing device increases to let the first thin film protrude to touch the switch of the thin film sensing device to control the motor to pump or not to pump the water.