I walked to this campus this morning. It took ten minutes to walk from the hotel I stay to this campus. During the walk, I noticed that the road in this town is far wider than in my hometown. Moreover, there were more cars on the street than the street in my town.I was surprised at the sound those cars made. 聼起來自然嗎?

I walked to the campus this morning, it took ten minutes from the hotel. While walking, I noticed the road in this town is far wider than in my hometown. There were also more cars on the street as well. I was surprised by the sounds made by those cars.

In the first sentence, you should not use "this" two times if you say "this campus" it would only sound natural if you were at the campus when saying that sentence. I changed it to "the campus" to make it sound more natural.
I joined the first two sentences together and eliminated the "I stay to this campus" because if you join the two sentences together it's implied that you are staying at the hotel, and it took ten minutes to walk to the campus.
Your third sentence was well written, optionally you could remove the "during the walk," part and just go straight to "I noticed the road..."
In your forth sentence, you don't have to compare the cars on the street to the street in your town. You can simply say "as well" because the listener will know you're talking about a comparison to your hometown because it was mentioned in the previous sentence.

Overall, well written though! I can tell you have a pretty good command of English already.