Yeah she can sponsor her husband and children if she holds a residence permit for certain professions and her salary is not less than QR10, 000. The Qatar authorities may ask for documents are as Given below...Dont forget to get all your docs and certificates attested from both embassy's.
application form (available from employer / MOI)
passport in which the original entry permit has been stamped.
photographs
original medical clearance certificate.
copy of the husband’s employment contract.
salary certificate from the employer stating the employee’s monthly salary.
marriage certificate (legalised by relevant authority)