PURPOSE: To operate the sluice remotely without operation by an operator at the site by using a battery and a solar cell as power source for a driving motor and employing laser beams as a remote control signal.

CONSTITUTION: A control section 14, which receives a laser-beam signal from a control station 20 separating by at least 200m or more and discriminates a supply closing command signal and a switching operation signal, the driving motor 9 for vertically moving a spindle 6 directly coupled with a sluice gate 3, the battery 12 for supplying the control section 14 and the motor 9 with power, and the solar cell 16 of capacity capable of compensating a decrease of capacity accompaning the self-discharge of the battery 12 are provided. Accordingly, when a laser-beam signal is used as the switching operating signal for the sluice, a remote control from a remote place of 200m or more, which cannot be realized by ultrasonic waves or a radio signal due to its directivity, is enabled. When the battery 12 and the solar cell 16 are used as the power supplies for the motor 9 for switching the sluice gate 3, a power supply at low cost can be obtained as compared with a power-line construction.