The utility model relates to a watering device is used to median. This watering device is used to median, water storage tank base including level setting, be equipped with a drain from the tape control valve on the water storage tank base right side, the raceway that inside and water storage tank base that each side at the water storage tank base top was equipped with a vertical setting are linked together, be equipped with the rainwater catch tray that a level set up at the top of raceway, the raceway is linked together with the inside of rainwater catch tray, be equipped with the cooler bin that a level set up in the top of rainwater catch tray, vertically between two raceways be provided with the solar energy collection pipe that a plurality of foundation portions and water storage tank base are linked together. This watering device is used to median, rational in infrastructure, convenient and practical can collect the rainwater in rainy season, waters the plant behind the purification rainwater.