A multifunctional planting system includes a supporter and a spraying device. The supporter includes a base and a plurality of lateral walls. The lateral walls are bent from the base to form a sunken structure for storing nutrient solution. The spraying device is disposed on the supporter. The spraying device includes an accommodating structure, a buckling component and a piezoelectric component. The nutrient solution is accommodated inside the accommodating structure. The buckling component passes through the accommodating structure. The piezoelectric component is disposed on a hollow portion of the buckling component. A plurality of tiny apertures are formed on the piezoelectric component. The piezoelectric component receives an electronic signal to generate oscillation. The oscillation transforms the liquid nutrient solution inside the accommodating structure into the gaseous nutrient solution. The gaseous nutrient solution is sprayed via the plurality of tiny apertures, and is condensed to flow into the sunken structure.
