PURPOSE: A plastic greenhouse including an opening type roof is provided to operate a hydraulic cylinder using a motor for opening the roof by dividing the root into two parts.CONSTITUTION: A plastic greenhouse(1) including an opening type roof comprises the following: a weight detecting sensor(8) installed on one side of the greenhouse； an artificial intelligence circuit(6) operated by a sensor(8`)； lines(4, 4`) combined to iron post middle portions(5, 5`) of roof units(7, 7`)； a motor(3) connected to a hydraulic cylinder(2) for pulling the lines installed on the tip-end of the greenhouse and opening both sides of the root； a piston combined to the lines； and an artificial intelligence circuit automatically operating when the specific weight is detected in the weight detecting sensor, and pulling the lines combined to the piston.COPYRIGHT KIPO 2012.
