Disclosed herein are a water purifying device and a method for controlling the same. The water purifying device is characterized in that a water discharge module capable of moving vertically is provided with a sensor. Specifically, in the water purifying device of one embodiment, the sensor may measure a height of a container, by transmitting and receiving a signal for measuring a distance at a first point of the water discharge module, and may detect both a height of the inlet of the container and a water level, by transmitting and receiving the signal and measuring a water level at a second point of the water discharge module.