The utility model discloses a remote monitoring system for dam water collecting well drainage. Relating to the technical field of dams, water collecting well, a drainage pump is mounted on one side ofthe inner wall of the bottom end of the water-collecting well; the water outlet end of the drainage pump is communicated with the drainage pipe; a liquid level meter is arranged in the water collecting well; an upper warning line is arranged on one side of the inner wall of the water collecting well, an upper limiting line is arranged on the other side of the inner wall of the water collecting pool, an alarm box is arranged at the top end of the liquid level instrument, a buzzer is embedded in the alarm box, and when the water level in the water collecting well is higher than the upper warning line, the buzzer on the alarm box gives out alarm sound to give an alarm. Data communication is realized between the signal acquisition box and a computer in a monitoring room by adopting an opticalfiber, and the computer timely controls a short message transmitter to receive field terminal data and send water level height information in the water collecting well to a mobile phone of a worker for short message reminding, so that the worker is timely informed to process.