A robot apparatus includes a storage that stores first instructional information which serves as a guide to first work operation, an acquirer that acquires second instructional information which serves as a guide to second work operation similar to the first work operation or second work operation related to the first work operation from a different apparatus having the second instructional information, and a work controller that performs the first work operation based on the first instructional information stored in the storage and the second work operation based on the second instructional information acquired by the acquirer.