Provided are a method and apparatus for monitoring video quality. The method for monitoring video quality comprises: (a) receiving first visual rhythm information of an encoded video from a first server; (b) extracting second visual rhythm information of the video obtained by receiving the encoded video through a network, and decoding and reproducing the received video; (c) calculating a visual rhythm difference on the basis of the first visual rhythm information and the second visual rhythm information; and (d) transmitting the calculated visual rhythm difference to a second server, wherein the second server measures the degradation of video quality of the reproduced video using the visual rhythm difference.