The objective of the present invention is to provide a method capable of rapidly, simply and accurately predicting the productivity of an afforestation candidate area, including the productivity of planted trees in an afforested area. The present invention provides a method for predicting the productivity of an afforestation candidate area, including (A) to (D): (A): sort soil component values and soil spectra in reference forest area by means of multivariate analysis to obtain a correlation between soil component values and soil spectrum; (B): sort productivity, topographic information and soil component values in reference forest area by means of multivariate analysis to obtain a correlation between productivity, topographic information and soil component values; (C): from the soil spectrum of the afforestation candidate area, obtain a predicted value of the soil component values on the basis of the correlation obtained in (A); and (D): obtain a predicted value of the productivity of the afforestation candi
