The invention relates to a bullet screen protection method and device, belongs to the field of processing of video information, and in particular relates to an intelligent bullet screen protection method and device for a video website. The intelligent bullet screen protection method comprises the following steps of: (1), receiving a bullet screen storage period and a bullet screen storage upper limit set by a user, when the period is up, judging whether the number of bullet screens is beyond the bullet screen storage upper limit or not, if so, executing the step (2), and otherwise, storing all the bullet screens of a video; and (2), sorting bullet screen contents in an inverted order according to the time axis, deleting a part of bullet screens having the longest generation time, and then, storing residual bullet screens. In general, compared with the prior art, the technical scheme in the invention has the advantages that: bullet screen information is merged; therefore, the bullet screen storage space is saved; and furthermore, important information in the bullet screens can be prevented from being deleted.