The present invention relates to a nutrient solution cultivation management device for a smart greenhouse and a crop cultivation monitoring service system therefor. According to the present invention, the device comprises: a weight detection unit detecting the weight of a slab having crops to be cultivated planted therein； a supply solution detection unit detecting the supply amount of nutrient solution fed to the slab； a discharge solution detection unit detecting the discharge amount of nutrient solution discharged from the slab； a display unit displaying information about the slab； a warning unit warning a user of occurrence of abnormality； a control unit displaying, on the display unit, a supply change in the nutrient solution supplied to the slab for each time, a discharge change in the nutrient solution discharged from the slab for each time, and a weight change in the slab for each time by using a weight value detected through the weight detection unit, the supply solution amount detected through the supply solution detection unit, and the discharge solution amount detected through the discharge solution detection unit, warning the user of the occurrence of abnormal through the warning unit when the weight change in the slab is out of a preset reference range, and differently setting the preset reference range to a first time interval from sunrise to first solution supply, a second time interval from the first solution supply to the last solution supply, a third time interval from the last solution supply to sundown and a fourth time interval from sundown to sunrise； and a growth environment monitoring unit transmitting data acquired by monitoring a growth environment of the crop to an external device through a communication network. Accordingly, the device can implement nutrient solution supply suitable for characteristics of the crop through effective monitoring for cultivating the crop.본 발명은 재배할 작물이 식재된 슬라브의 무게를 감지하는 무게감지부； 슬라브에 공급되는 양액 공급량을 감지하는 급액감지부； 슬라
