Is there one more earth in the universe/galaxy?If yes where? and anybody is living there?

The term used is exoplanet. There are currently over 200 known exoplanets but more and more are being found all the time.

They are trying to find them in the 'habitable zone' this is where it's not too hot or too cold for life.

Basically if they knew if anyone was living on another earth like planet do you honestly think it would have escaped media attention !

may be.Some people think there might be some planets in universe which contain life and that we are not alone.Coz the Universe is so huge and we have not explored 1% of it till now.so who knows it might be somewhere.

there is one more moon in the universe/galaxy and may be in the our home or may be in the our room .

in my opinion, there is none. our planet is one unique ball where humanoids live carelessly allowing global warming to take over. :p

well there is mars they say that theres living organisims there

yep, in my room