Provided are a field display device and the like capable of displaying a plurality of fields to be displayed on a screen reliably and immediately. A field information management device is configured such that: a plurality of fields for cultivating plants can be displayed on a main screen, and a plurality of pieces of character information related to the fields that can be displayed on the main screen can be displayed on a sub-screen simultaneously with the main screen; and shape information of each of the fields that can be displayed on the main screen is displayed on the sub-screen together with the character information related to the corresponding field.