The invention discloses a webpage detection method and a webpage detection device. The webpage detection method includes the steps of detecting a target webpage updated within preset time from a target website; analyzing access data of the target webpage to obtain access parameters thereof, wherein the access parameters are used for reflecting accessed conditions of the target webpage; judging whether the access parameters meet preset conditions or not; determining that the target webpage is a validly updated webpage when the access parameters are judged to meet the preset conditions. The webpage detection method and the webpage detection device are capable of solving the technical problem about failure to assess webpage updating effects in the prior art.