To maintain/manage a golf course by reading data on works, machines/tools and working hours marked on a mark-sheet and inputting them to a computer.

In a working journal mark-sheet with items to be marked on the works on maintenance/management of a golf course, a course mark section 17 corresponding to a course for which the works have been done, a hole mark section 24 corresponding to a hole for which works have been done, a working code mark section 18 corresponding to the contents of the works, a machine/tool mark section 20 corresponding to a machine/tool used for the works, and a work starting/finishing time mark section 21 corresponding to the starting time and the finishing time of the works are provided.