Hi!
Is there any way to download all the map into my computer?
Thank you,
Yaad
You must have a big computer. 
Seriously, it’s hundreds upon hundreds of gigabytes of map tiles, if you go up to z18. If you start to scrape the tile server, you’re likely, no, actually guaranteed, to be banned from the server for a while.
But the interesting part is: what do you want to use it for? There are better ways to get maps for yourself, which could include importing the planet file into your own db, and rendering your personal tiles from there. That only requires 6GB of downloads (planet file and various tools, like mapnik, mod_tile, apache, postgresql, postgis) and you can render whatever you want to.