Subject evaluation method, device and system

The invention discloses a subject evaluation method, device and system, and belongs to the field of subject selection. The method comprises the following steps: acquiring extrinsic behavior data of a target subject based on a plurality of first users to obtain an extrinsic behavior data sample set, wherein the score of the first user based on the target subject meets a preset condition; conducting clustering analysis on the extrinsic behavior data sample set, obtaining multiple measurement dimensions of the target subject, wherein each measurement dimension is associated with multiple pieces of extrinsic behavior data; acquiring extrinsic behavior data of a second user; obtaining measurement dimension data of the second user based on the external display behavior data of the second user; and determining a subject evaluation result of the second user according to the measurement dimension data. The embodiment disclosed by the invention can be used for helping students to scientifically and quickly select subje