The present invention relates to a chain diagnosis apparatus and a chain diagnosis method, and the chain diagnosis apparatus according to an embodiment of the present invention includes a housing having a tunnel having a cross section corresponding to the cross section of the chain so that a chain can pass therethrough, the tunnel A magnetization unit positioned adjacent to and magnetizing a chain passing through the tunnel, a sensing unit positioned adjacent to the tunnel and sensing a magnetic signal from the magnetized chain, and analyzing the magnetic signal to diagnose the state of the chain It is characterized in that it comprises a diagnostic unit.
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