I wanted put on my bike 110 mm stem. But finally i found cheap one 100mm stem. I want bring my handlebar closer to my body. 100 mm is go make much difference than 110mm stem?

It will make about 10mm worth of difference.

I like your joke yes is just 10mm difference is not much but that difference i want to see how my bike is go handle with the 100mm stem and the handlebar reach

What length is on your bike now? What is the angle?

Most LBS will let you try a stem before you buy. It's the only way to know ahead of time whether a particular length will work for you.

As far as how it handles - handlebars will be more twitchy. Smaller movements will make larger than expected changes. But you can adjust.

Sure, you'll notice a 1 cm difference.

Before the stem i have on my bike is 120mm. The angle i not know i buy the bike used the stem is was on the bike. maybe the angle is 30 degrees As online bike size calculator tell me i ride bike 56cm. My bike is 57cm. I put the bike on the trainer i sit on the bike and i put my hands in the drops. I see the hub on the wheel is behind the end of the stem. Because i buy cheap one 100mm stem i tried that stem. Now i see the wheel hub just little the front of the end of the stem. With the 120mm stem i feel i stretched for reach the handlebar. Now with the 100mm stem i feel better and my elbows is have some degree. I think with 110mm stem i go feel better. I try do home fitting

Are you sure you have your saddle fore/aft adjusted properly? You can shorten your reach that way also. Just don't overdo it.