The invention discloses an automatic reminding system for the water shortage of a flowerpot, which comprises a flowerpot main body, a hygrometer is arranged in the flowerpot main body, and the hygrometer is connected with a controller through a conducting wire. The invention has simple structure and is convenient to use, only the hygrometer is required to be placed in the flowerpot, and the hygrometer is matched with the controller. Thus, a warning prompt can be made when mud needs watering, so that plants can be prevented from drying to death due to water shortage.