PROBLEM TO BE SOLVED: To provide a plant factory system using a reefer container which maintains airtightness and is easy to manage temperature and the like without adding extra construction and cost.SOLUTION: The present invention is equipped with a box-shaped container body 10; a reefer 20 provided in the container body 10 and having at least a temperature adjusting means 22 and ventilation means 21; and a power receiving unit 30 which receives power from the outside and supplies power to the referee 20, wherein a reefer container 1 transportable by receiving the power from the power supply of a transportation means is provided, a plant cultivation space is provided within the container body 10, and furthermore a temperature adjusting and controlling means which adjusts the temperature within a plant cultivation space using the temperature adjusting means 22 by supplying electric power to the power receiving unit 30 of the reefer container 1 through a power supply 50 equipped with a transformation facility, and a ventilation controlling means which controls the ventilation within a plant cultivation space using the ventilation means 21 are provided.SELECTED DRAWING: Figure 3