For applying for family VISA, u need to submit the following documents:
1.Application form-available in the photostat centre near Immi.centre, Madeenath Khalifa.
2.NOC from your sponsor showing your salary.your ID no and the name and passport no of your wife.Check the spelling also. Make a double check as it is typed in Arabic.
3.Marriage certificate and educational certificate duly attested by ministry of your country and Qatar-both are required.
4,Computer card copy of sponsoring company.
5.Baladiya attested rent agreement copy,id copy of the building owner, electricity&water bill copy of your accommodation
6.Copy of existing VISA
7.Labour ministry attested employment contract showing QR10000 per month salary
8.Your bank statement,taken from bank with their seal and signature, showing minimum six months salary transfer to that account. Make sure that there is only one transfer per month.

Submit it in Madeenath Khalifa Immigration office Gate No 2. Take token for "Receipts". Check moi website for update.The first comment will be "Application under review".It will change to "Under process" after 3-4 days, if accepted, "Application Rejected" if rejected. If it is rejected, you can go and request for a meeting and they will allot you a date for the meeting. If the message is "Application is pending", it means that some papers are missing and you have to enquire and submit it.If accepted, the "Under process" will change to "Visa ready to print" and you can approach any immigration center for further process.