The present invention operates a satellite facility in a fully automated manner, even for a grain processing facility (for example, a cooperative grain drying/preparing facility, a rice-polishing factory, a foodstuff factory, or the like) at which the characteristics of starting materials change from day to day and hour to hour. An operation assistance system for a grain processing facility, the operation assistance system comprising: a database in which first characteristics for a first grain that was brought into a model facility, first operation parameters for the model facility that were used when the first grain was processed at the model facility, and an index value measured for the taste of the first grain after processing at the model facility are associated and stored； a reception unit that receives second characteristics for a second grain that is brought into a satellite facility； a calculation unit that, on the basis of the received second characteristics and of the information accumulated in the database, calculates second operation parameters that are to be used when the second grain is processed at the satellite facility； and a provision unit that provides the calculated second operation parameters to the satellite facility over a network.
