Abstract: In a remote server that receives from a work machine or a vessel, machine identification information as information for identifying the work machine or the vessel and predetermined operation data, a service center in charge of the work machine or the vessel is identified based on the machine identification information, a repair part required in the service center and a repair timing of the repair member are determined based on the operation data received from the work machine or the vessel and on any one of a regular maintenance history received as appropriate and the regular maintenance history received from the work machine or the vessel, and the service center is notified that the repair part is required at a timing earlier than the repair timing determined by a predetermined period.

Abstract: In a remote server that receives from a work machine or a vessel, machine identification information, identifying the work machine or the vessel, and predetermined operation data, at least one of a managing entity of the work machine or the vessel and a sales entity in charge of the managing entity is identified based on the machine identification information, a base buying price of the work machine or the vessel is calculated based on the predetermined operation data received from the work machine or the vessel, and any one of a regular maintenance history input as appropriate and a regular maintenance history received from the work machine or the vessel, and the base buying price calculated is set to be viewable in at least one of the managing entity and the sales entity when a predetermined period elapses after a predetermined counting start day.