Method and system for controlling water spraying

The present invention provides a method and system for controlling water spraying, the method comprises: receiving an activation command for a smoke density detector (100); the smoke density detector (100) detecting in real time a smoke density value within a room; the smoke density detector (100) determining if the smoke density value has reached a preset threshold; if it is determined that the preset threshold has been reached, the smoke density detector (100) sending an infrared command to an infrared-sensing water tap (200); the infrared-sensing water tap (200), upon sensing the infrared command, automatically opening a valve of the infrared-sensing water tap (200) to initiate water spraying.