Q:

What lens and setting to take ISS photo?

Here it says we can see ISS with our naked eye. I was thinking that if we can see this thing with our eyes, then obviously we can take photo with a DSLR. I have Nikon D3300 with 18-55mm lens and Photron Stedy 400 Tripod.
My questions:

what are the setting(shutter speed,exposer) to take ISS clear image?
which lens to use to take ISS image?(18-55mm will be is ok?)

A:

The ISS is rather small.  Glance at this photo from Astronomy Picture of the Day which has the space station in front of the moon.  A small crop of it shows that it's really not much bigger than the craters when seen from Earth

This type of photograph will require a telescope.  The moon is 1/2° across and even those huge 600mm lenses for a dSLR when mounted on a DX format sensor still have 2 1/2° field of view.
This type of photograph requires a telescope and precise timing.  Its doable, as can be seen.

The other approach is that of a star trail.  The ISS (and other satellites) move at a very good clip across the sky - much more than the 1° every 4 minutes that stars do from the rotation of the Earth.  The picture below, from Wikipedia, is a 2 minute exposure.  

You add the ISS, and you get something more like...

From How do I set the focus in long exposure night sky shots?
Ok, so thats not a star trail, but that is the ISS, and that is how it would look (in a stacked photograph) of a star trail too.
The point that is being made here is that the ISS is just another 'star'. A bit brighter than other satellites, but comparable.
As with other star trails, a normal or wide lens will work quite nicely. Just know where and when to point your camera, and photograph it.
For that (which I would argue is the trickiest part), you should go to http://spotthestation.nasa.gov and sign up for alerts.

