The embodiment of the invention discloses a soil detection device, which comprises a soil detection module, a state monitoring module and a state display module, wherein the soil detection module is used for detecting feature values used for evaluating at least one soil feature of the growth environment of plants planted in the soil, and sending the at least one soil feature value to the state monitoring module through a wireless communication module; the state monitoring module is used for obtaining the evaluation result of at least one soil feature on the basis of at least one soil feature and the evaluation parameters corresponding to the soil features, and sending the at least one evaluation result to the state display module; the state display module is used for receiving and displaying the at least one evaluation result sent by the state monitoring module. The device provided by the embodiment of the invention has the advantages that through the soil feature detection, the soil evaluation result is obtained through the evaluation parameters; the evaluation result is displayed through the state display module; the plant growth environment state can be displayed in real time, so that a user better masters the growth condition of the plants; the plants can be cared by the user according to the plant growth conditions.