[Problem] To provide a soil analyzing device and a soil analyzing method capable of accurately obtaining cation exchange capacity (CEC) which serves as an indicator for evaluating the fertility of the soil. [Solution] The soil analyzing device includes: a sensor 10 having an excitation coil 11 and a detection coil 12; a measurement unit 20 that generates an excitation signal, per frequency, to be input to the excitation coil 11 in order to apply an alternating magnetic field to the soil to be analyzed, and processes a detection signal output from the detection coil 12 by applying the alternating magnetic field to the soil to be analyzed; a storage unit 33 that stores data concerning the correlation between a quantitative value of the soil fertility characteristics including CEC of two or more types of the soil having different components and an estimated value of the soil fertility characteristics including CEC found from the processed detection signal measured by the sensor 10 and the measurement unit 20; and an estimation unit 34 that estimates the soil fertility characteristics including CEC of the soil to be analyzed based on the detection signal generated by allowing the sensor 10 to apply the alternating magnetic field to the soil to be analyzed and processed by the measurement unit 20, and by using the data stored in the storage unit 33.
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