The present disclosure illustrates a sensor-controlled nasal aspirator including a distance sensing unit, a micro processing unit and an air pump. The distance sensing unit is configured to sense a distance between a target object and the distance sensing unit. The micro processing unit is configured to store a preset distance, and receive and process the distance transmitted from the distance sensing unit, and transmit an action command signal when the distance is not higher than the preset distance. The air pump is configured to receive the action command signal and performs a target action according to the action command signal.