The present invention provides a flower pot using humidity sensor material to prompt watering, including an outer pot body (1), in the form of a watertight dish body, an inner pot body (2), and a humidity sensor material that is packed in the pot wall of the outer pot body. The inner pot body (2) is fabricated from multi-pore material and is disposed within the outer pot body, and the inner pot body brim is provided with a water filling hole (21). Or the outer pot body (1) is fabricated from multi-pore material, the outer wall thereof being coated with a water resisting layer and includes a sensing region coated with a humidity sensor material (3). Accordingly, the water content in the inner pot body can be known through use of the humidity sensor material (3), prompting the user whether or not to add water, and further regulating the water content of the potted plant.
