Passport copy of your spouse and urs.
Company letter stating your position and salary with NOC
Marriage certificate dully attested by ur embassy and the Interior ministry of Qatar
copy of your ID and Visa.
Bank statement for the last 6 months

The catagory of your visa is also plays some role in the family visa. i.e. if you are on some professional visa like Engr / doc then it will be easier to get the family visa