Tainan District Agricultural Research & Extension Station has devoted to developing the short-term leafy vegetable automatic production system in recent year. In order to solve the irrigation problem, this research adopted simple machinery design and matched up with G-language program to accomplish a pragmatic irrigation device. This device has added the short-term leafy vegetable automatic production system and performed the irrigation of water and nutrient. The results show real benefits to promote the quality of the leafy vegetable and reduce the cultivation management manpower. Expectably, the technology of short-term leafy vegetable production automation has already made a great stride.