Your husband can apply for her visa. I understand that you are under your husband's sponsorship. In order to bring ur mother to Qatar, your husband should get NOC from his company stating that they do not have objection if your mother comes to qatar. Once he gets that letter, your husband should go to immigration office and apply for her visa. This visa is valid for 6 months and can be extended on request.
Your husband can apply for her visa. I understand that you are under your husband's sponsorship. In order to bring ur mother to Qatar, your husband should get NOC from his company stating that they do not have objection if your mother comes to qatar. Once he gets that letter, your husband should go to immigration office and apply for her visa. This visa is valid for 6 months and can be extended on request.