PROBLEM TO BE SOLVED: To provide an automatic plant culture system which can easily culture several kinds or many kinds of plants having different planting times, harvesting times, growing speeds and the like, even when the plants are simultaneously cultured, and the like. SOLUTION: This system for automatically culturing plants has plant holders 5 used as carriable unit culture devices in which plants are planted, a culture zone 2 where the several or many plant holders 5 are set to grow the plants planted in the plant holders 5..., a work field 3 for treating the plants, and working robots 14 each used for separately holding the holder 5 to carry the plants in the unit of the holder between the culture zone 2 and the working field 3.
