PURPOSE: To provide the title system capable of improving viable settability of seedlings or jointed seedlings, of reducing the working time for tray loading, and also of increasing the quantity of trays to be housed.

CONSTITUTION: A raising chamber 11 having a temperature regulator 13 and a humidity regulator 14 and also equipped with a door 12 is provided, and a table 15 having shelves 23 to be plurally loaded with trays 30 planted with seedlings or jointed seedlings 31 is movably provided and ensured to bring, in such a state as to be loaded with the trays 30, via said door 12 into the raising chamber 11 and set up there.