Aslmu alikum
My question is that eating brolier chicken is halal or harm in islam

Walaikum salam,

Yes, it is halal.

When the chicken is slaughtered Halaal, it`s Halaal no matter if you eat it broiled. The basic rule, my friend, is that everything of food and resources and actions of dunjaa are Halaal except what has been forbidden by Allaah and Rasuul -sAaws.
The evidence is that Allaah -Tha Majestic- said in Surat Al-Baqrah: 29. It is He Who hath created for you all things that are on earth; Moreover His design comprehended the heavens, for He gave order and perfection to the seven firmaments; and of all things He hath perfect knowledge.