To dismantle and reuse used game machines for appropriate applications.

Game machine manufacturers 4 store used game machines 3 sent from a used game machine exchange center 1, collect and store used game machines 3 disposed of from game parlors 2 and edits management information concerning the used game machines 3. Recycling companies 5 dismantle used game machines entrusted to them from the game machine manufacturers 4 and classify into reusable parts 8 and nonreusable parts 9, send the reusable parts 8 to the game machine manufacturers 4 and inputs management information concerning the reusable parts 8 to the computers 13 of the recycling companies 5. The game machine manufacturers 4 improves the management information edited by management information concerning the resuable parts 8 inputted from the computers 13 of the recycling companies 5 through the Internet by the computers 12 of the game machine manufacturers 4.