The invention provides a method for rapidly accessing and searching pictures online, comprising steps of providing a picture data uploading module, a picture data storing module, a data processing module, a picture data buffer module and a picture display module, wherein the method for rapidly accessing and searching pictures online comprises step S1 of obtaining basic information data of the picture by the picture data uploading module and obtaining a picture ID through MD5 algorithm; step S2 of orderly searching if the picture is existed from the picture data buffer module by the picture data uploading module according to the picture ID; if existed, downloading the picture; if not, terminating the picture downloading. The method for rapidly accessing and searching pictures online can rapidly browse various formats of pictures, save waiting time for watching pictures, saving flow resources when user watches pictures, improving the picture obtaining efficiency, satisfying the rapid picture browsing experience of the user, rapidly reducing the I/O access volume of a disk, filtering invalid pictures, and significantly improving the hit rate of the picture information.