This invention is an intelligent irrigation system comprising at least one supply line, a pressure sensor, a pump, a surge tank, at least one solenoid valve, at least two sets of accurate output conduit devices, at least two load cell and at least one programmable logic controller. An accurate output conduit device includes a catheter unit, a tube unit, and at least one capillary unit. With a complete intelligent irrigation system and accurate output conduit devices, it can achieve the accurate irrigation function of programmed intelligent.本發明乃是一種智能灌溉系統,其包括:至少一供給管路、一壓力感測器、一幫浦、一緩衝壓力桶、至少一件電磁閥、至少二組精準輸出導管裝置、至少二件荷重盤及至少一組可編程邏輯控制器。其中,一種精準輸出導管裝置,包括:一導管單元、一管路單元、至少一毛細管單元。其具完整智能灌溉系統及精準輸出導管裝置,以達到可程式化執行其智能精準灌溉功能。