The machine element selection support system comprises a database apparatus and a selection support server, while the selection support server is connected to a network. A customer, who wishes to select a machine element, gains access to the selection support server using a customer terminal. The selection support server receives, from the customer terminal, information relevant to the specifications and operating conditions of machine elements to be selected, the purchase conditions of the machine elements, and machine element selection information including information relevant to the output mode of information relevant to selection candidates, extracts selection candidates in accordance with not only the specifications and operating conditions information but also information stored in the specification databases and, in accordance with an output mode received, outputs to the customer terminal information relevant to the selection candidates that can satisfy purchase conditions of the extracted selection candidates.