If i get best time some category. Do it mean I have world Record?

What do you mean?

That if i get best time. Do i do Like world Record

...You mean like beating a time faster then the world record of a catagory?

Yes

If you have the fastest time you have the wr, as long as it's faster than every other run.

If you have the fastest time you have the wr, as long as it's faster than every other run.