To provide a plant cultivation system in the form of a methane fermentation plant system designed to be controllable according to plant shipping plan situation.

This plant cultivation system in the form of a methane fermentation plant system 7 has the following scheme: a plant shipping management computer C for identifying plant shipping plan situation functions to make a control on a computer 17a for the environmental control of plant cultivation facilities and the electric power to be outputted to the cultivation facilities is controlled.