Agricultural management system, server, agriculural management method, server control method and server program

The purpose of the present invention is to provide an agricultural management system or the like that is able to provide management information regarding crops that are suitable for fields when an event has occurred. The agricultural management system comprises a sensor terminal that measures environmental information for set fields and transmits the measured environmental information of the fields to a server; and a server that stores, for each of a plurality of fields, an evaluation value indicating the production value of crops harvested on the field in the past, in association with environment information for growth periods during which the crops were grown, that receives the current environmental information for the fields transmitted from the sensor terminal, that prepares, on the basis of the current environmental information, environment adaptation information indicating the environment necessary for harvesting crops of a designated evaluation value, and that transmits the environment adaptation information for each field to a portable terminal possessed by a user operating each field.