A seed level managing system includes a seed tank configured to contain seeds, a plurality of seed level sensors placed on a sidewall of the seed tank, a surface detecting sensor, and a controller. The controller includes one or more processors, one or more memory modules, and machine readable instructions stored in the one or more memory modules that, when executed by the one or more processors, cause the controller to receive first information from the plurality of seed level sensors； receive second information from the surface detecting sensor and determine a number of the seeds in the seed tank based on the first information and the second information.
