wget(1) -nd -r -P /save/location -A jpeg,jpg,bmp,gif,png http://andar.co.kr
The non-interactive network downloader
Directory Options
        Do not create a hierarchy of directories when retrieving recursively.  With this option turned on,
        all files will get saved to the current directory, without clobbering (if a name shows up more than
        once, the filenames will get extensions .n).
Recursive Retrieval Options
        Turn on recursive retrieving.    The default maximum depth is 5.
-P prefix
    Set directory prefix to prefix.  The directory prefix is the directory where all other files and
    subdirectories will be saved to, i.e. the top of the retrieval tree.  The default is . (the current
Recursive Accept/Reject Options
    -A acclist --accept acclist
    -R rejlist --reject rejlist
        Specify comma-separated lists of file name suffixes or patterns to accept or reject. Note that if any
        of the wildcard characters, *, ?, [ or ], appear in an element of acclist or rejlist, it will be
        treated as a pattern, rather than a suffix.
wget [option]... [URL]...
source manpages: wget