To properly and easily reserve repairing operation for a vehicle, etc., by reserving available date and time according to estimated repair time and data of reserved repair.

A control part checks on a display device whether vehicle specification data and a damage position are inputted from a mouse or keyboard (S101, 102), and estimates an operation time and repair cost according to damage contents data (S103, 104). The control part displays a reservation state confirmation screen on the display device, shows what days can be reserved in a calendar field, and displays a reservation input screen on the display device when a desired reservation day is selected (S106, 107). In an operation reservation table part of a pit reservation state field, a pit is reserved in the period that an individual operation time display body of a reservation input vehicle data field occupies. Thus, an operation process and an operation time are automatically calculated from estimation contents to accept a reservation through easy operation, and the reservation state can accurately be grasped.